Skip to search results Skip to filters Skip to sort Skip to selected filters

Women's Cross Body Gray Handbags

Name: The Leather Medium Tote Bag
Brand: Marc Jacobs
Price: $450.00 USD

74 items found

Sort By

Your Selections

Search Results

Marc Jacobs - The Leather Medium Tote Bag. Color Wolf Grey. $450.00. 5.0 out of 5 stars

Gray Marc Jacobs The Leather Medium Tote Bag

Brand Name: Marc Jacobs
Product Name: The Leather Medium Tote Bag
Color: Wolf Grey
Price: $450.00
Rating: 5Rated 5 stars out of 5(3)

Brahmin - Finley Carryall. Color Fairest Grey. Low Stock. $395.00. 5.0 out of 5 stars

6 left in stock

Brand Name: Brahmin
Product Name: Finley Carryall
Color: Fairest Grey
Price: $395.00
Rating: 5Rated 5 stars out of 5(2)

HOBO - Sheila. Color Granite Grey. Low Stock. $388.00. 4.4 out of 5 stars

2 left in stock

Brand Name: HOBO
Product Name: Sheila
Color: Granite Grey
Price: $388.00
Rating: 4Rated 4 stars out of 5(22)

Brahmin - Large Duxbury Satchel. Color Fairest Grey. Low Stock. $385.00.

6 left in stock

Brand Name: Brahmin
Product Name: Large Duxbury Satchel
Color: Fairest Grey
Price: $385.00
Rating

Hammitt - Daniel Medium Tote. Color Grey Natural/Brushed Gold. On sale for $371.25. MSRP $625.00.. 4.3 out of 5 stars

Brand Name: Hammitt
Product Name: Daniel Medium Tote
Color: Grey Natural/Brushed Gold
Price: $371.25MSRP: $625.00
Rating: 4Rated 4 stars out of 5(26)

Tory Burch - Perry Small Triple Compartment Tote. Color Light Umber. Low Stock. $348.00. 3.0 out of 5 stars

8 left in stock

Gray Tory Burch Perry Small Triple Compartment Tote

Brand Name: Tory Burch
Product Name: Perry Small Triple Compartment Tote
Color: Light Umber
Price: $348.00
Rating: 3Rated 3 stars out of 5(4)

Marc Jacobs - The Snapshot. Color Wolf Grey Multi. $325.00. 4.7 out of 5 stars

Brand Name: Marc Jacobs
Product Name: The Snapshot
Color: Wolf Grey Multi
Price: $325.00
Rating: 5Rated 5 stars out of 5(38)

Hammitt - Daniel Large Tote. Color Grey Natural/Brushed Gold. Low Stock. On sale for $319.73. MSRP $725.00.. 4.6 out of 5 stars

1 left in stock

Brand Name: Hammitt
Product Name: Daniel Large Tote
Color: Grey Natural/Brushed Gold
Price: $319.73MSRP: $725.00
Rating: 5Rated 5 stars out of 5(176)

Brahmin - Margo. Color Fairest Grey. Low Stock. $315.00. 4.9 out of 5 stars

6 left in stock

Brand Name: Brahmin
Product Name: Margo
Color: Fairest Grey
Price: $315.00
Rating: 5Rated 5 stars out of 5(8)

Hammitt - Davis Medium. Color Grey Natural/Brushed Gold. Low Stock. On sale for $311.85. MSRP $495.00.. 3.0 out of 5 stars

2 left in stock

Brand Name: Hammitt
Product Name: Davis Medium
Color: Grey Natural/Brushed Gold
Price: $311.85MSRP: $495.00
Rating: 3Rated 3 stars out of 5(2)

COACH - Quilted Pillow Leather Kira Crossbody. Color Grey/Blue. Low Stock. $295.00.

9 left in stock

Gray COACH Quilted Pillow Leather Kira Crossbody

Brand Name: COACH
Product Name: Quilted Pillow Leather Kira Crossbody
Color: Grey/Blue
Price: $295.00
Rating

Hammitt - Ryan. Color Grey Natural. Low Stock. $295.00. 4.0 out of 5 stars

1 left in stock

Brand Name: Hammitt
Product Name: Ryan
Color: Grey Natural
Price: $295.00
Rating: 4Rated 4 stars out of 5(1)

Marc Jacobs - The Teddy Medium Tote Bag. Color Grey. $275.00. 4.0 out of 5 stars

Gray Marc Jacobs The Teddy Medium Tote Bag

Brand Name: Marc Jacobs
Product Name: The Teddy Medium Tote Bag
Color: Grey
Price: $275.00
Rating: 4Rated 4 stars out of 5(5)

Kate Spade New York - Hudson Pebbled Leather Medium Convertible Crossbody. Color Platinum Grey. Low Stock. $248.00. 5.0 out of 5 stars

6 left in stock

Gray Kate Spade New York Hudson Pebbled Leather Medium Convertible Crossbody

Brand Name: Kate Spade New York
Product Name: Hudson Pebbled Leather Medium Convertible Crossbody
Color: Platinum Grey
Price: $248.00
Rating: 5Rated 5 stars out of 5(1)

Tory Burch - Kira Pebbled Wallet Crossbody. Color Gray Heron. $228.00. 4.7 out of 5 stars

Gray Tory Burch Kira Pebbled Wallet Crossbody

Brand Name: Tory Burch
Product Name: Kira Pebbled Wallet Crossbody
Color: Gray Heron
Price: $228.00
Rating: 5Rated 5 stars out of 5(11)

HOBO - Bellamy Medium Crossbody. Color Grey. Low Stock. On sale for $223.50. MSRP $298.00..

1 left in stock

Brand Name: HOBO
Product Name: Bellamy Medium Crossbody
Color: Grey
Price: $223.50MSRP: $298.00
Rating

THINK ROYLN - You Are The Champion Tennis Bag. Color Pearl/Black. Low Stock. $218.00.

5 left in stock

Gray THINK ROYLN You Are The Champion Tennis Bag

Brand Name: THINK ROYLN
Product Name: You Are The Champion Tennis Bag
Color: Pearl/Black
Price: $218.00
Rating

COACH - Hobo Crossbody in Cross Grain Leather. Color Grey/Blue. Low Stock. On sale for $210.00. MSRP $350.00.. 4.0 out of 5 stars

2 left in stock

Gray COACH Hobo Crossbody in Cross Grain Leather

Brand Name: COACH
Product Name: Hobo Crossbody in Cross Grain Leather
Color: Grey/Blue
Price: $210.00MSRP: $350.00
Rating: 4Rated 4 stars out of 5(3)

Brahmin - Katie. Color Fairest Grey. Low Stock. $195.00. 4.8 out of 5 stars

9 left in stock

Brand Name: Brahmin
Product Name: Katie
Color: Fairest Grey
Price: $195.00
Rating: 5Rated 5 stars out of 5(13)

COACH - Quilted Leather Heart Crossbody. Color Grey/Blue. Low Stock. On sale for $192.50. MSRP $350.00..

3 left in stock

Gray COACH Quilted Leather Heart Crossbody

Brand Name: COACH
Product Name: Quilted Leather Heart Crossbody
Color: Grey/Blue
Price: $192.50MSRP: $350.00
Rating

HOBO - Lauren Crossbody. Color Light Grey. Low Stock. $188.00. 5.0 out of 5 stars

6 left in stock

Brand Name: HOBO
Product Name: Lauren Crossbody
Color: Light Grey
Price: $188.00
Rating: 5Rated 5 stars out of 5(1)

Hammitt - Tony Small Crossbody. Color Grey Natural/Brushed Gold. Low Stock. On sale for $185.85. MSRP $295.00.. 4.5 out of 5 stars

1 left in stock

Brand Name: Hammitt
Product Name: Tony Small Crossbody
Color: Grey Natural/Brushed Gold
Price: $185.85MSRP: $295.00
Rating: 5Rated 5 stars out of 5(445)

COACH - Mini Signature Jacquard C Phone Crossbody. Color Cocoa/Burnished Amber. Low Stock. $175.00.

4 left in stock

Gray COACH Mini Signature Jacquard C Phone Crossbody

Brand Name: COACH
Product Name: Mini Signature Jacquard C Phone Crossbody
Color: Cocoa/Burnished Amber
Price: $175.00
Rating

Tory Burch - Miller Phone Crossbody. Color Light Umber. On sale for $159.60. MSRP $228.00.. 5.0 out of 5 stars

Brand Name: Tory Burch
Product Name: Miller Phone Crossbody
Color: Light Umber
Price: $159.60MSRP: $228.00
Rating: 5Rated 5 stars out of 5(4)

HOBO - Fern. Color Granite Grey. Low Stock. $158.00. 3.9 out of 5 stars

2 left in stock

Brand Name: HOBO
Product Name: Fern
Color: Granite Grey
Price: $158.00
Rating: 4Rated 4 stars out of 5(44)

. MICHAEL Michael Kors - Jet Set Charm Small Phone Crossbody. Color Aluminum Multi. $158.00. 5.0 out of 5 stars

Gray MICHAEL Michael Kors Jet Set Charm Small Phone Crossbody

Brand Name: MICHAEL Michael Kors
Product Name: Jet Set Charm Small Phone Crossbody
Color: Aluminum Multi
Price: $158.00
Rating: 5Rated 5 stars out of 5(1)

COACH - Polished Pebble Leather Phone Crossbody. Color Grey/Blue. Low Stock. On sale for $157.50. MSRP $175.00..

7 left in stock

Gray COACH Polished Pebble Leather Phone Crossbody

Brand Name: COACH
Product Name: Polished Pebble Leather Phone Crossbody
Color: Grey/Blue
Price: $157.50MSRP: $175.00
Rating

Baggallini - Overnight Expandable Laptop Tote with RFID Phone Wristlet. Color Sterling Shimmer. Low Stock. $150.00. 4.5 out of 5 stars

6 left in stock

Gray Baggallini Overnight Expandable Laptop Tote with RFID Phone Wristlet

Brand Name: Baggallini
Product Name: Overnight Expandable Laptop Tote with RFID Phone Wristlet
Color: Sterling Shimmer
Price: $150.00
Rating: 4Rated 4 stars out of 5(110)

HOBO - Winn Belt Bag. Color Light Grey. $138.00.

Brand Name: HOBO
Product Name: Winn Belt Bag
Color: Light Grey
Price: $138.00
Rating

. Marc Jacobs - The Micro Bucket. Color Iridescent. Low Stock. On sale for $130.10. MSRP $295.00.. 5.0 out of 5 stars

7 left in stock

Brand Name: Marc Jacobs
Product Name: The Micro Bucket
Color: Iridescent
Price: $130.10MSRP: $295.00
Rating: 5Rated 5 stars out of 5(1)

THINK ROYLN - Bar Bag. Color Pearl Grey. On sale for $129.36. MSRP $168.00.. 4.2 out of 5 stars

Brand Name: THINK ROYLN
Product Name: Bar Bag
Color: Pearl Grey
Price: $129.36MSRP: $168.00
Rating: 4Rated 4 stars out of 5(4)

HOBO - Darcy. Color Light Grey. Low Stock. $128.00. 4.3 out of 5 stars

4 left in stock

Brand Name: HOBO
Product Name: Darcy
Color: Light Grey
Price: $128.00
Rating: 4Rated 4 stars out of 5(62)

Cole Haan - Date Night Clutch. Color Gunmetal. Low Stock. On sale for $122.76. MSRP $248.00..

8 left in stock

Brand Name: Cole Haan
Product Name: Date Night Clutch
Color: Gunmetal
Price: $122.76MSRP: $248.00
Rating

Kipling - Gabbie. Color Tender Grey. Low Stock. $118.95.

8 left in stock

Brand Name: Kipling
Product Name: Gabbie
Color: Tender Grey
Price: $118.95
Rating

Baggallini - Modern Everywhere Bag. Color Sterling Shimmer. Low Stock. $110.00. 4.6 out of 5 stars

9 left in stock

Brand Name: Baggallini
Product Name: Modern Everywhere Bag
Color: Sterling Shimmer
Price: $110.00
Rating: 5Rated 5 stars out of 5(188)

Baggallini - The Only Bag. Color Sterling Shimmer. Low Stock. $100.00. 4.5 out of 5 stars

6 left in stock

Brand Name: Baggallini
Product Name: The Only Bag
Color: Sterling Shimmer
Price: $100.00
Rating: 5Rated 5 stars out of 5(34)

Baggallini - Crossover Crossbody. Color Charcoal. $99.99. 4.4 out of 5 stars

Brand Name: Baggallini
Product Name: Crossover Crossbody
Color: Charcoal
Price: $99.99
Rating: 4Rated 4 stars out of 5(162)

. Baggallini - Pocket Belt Bag Waist Pack And Crossbody. Color Steel Grey Twill. Low Stock. $99.95.

5 left in stock

Gray Baggallini Pocket Belt Bag Waist Pack And Crossbody

Brand Name: Baggallini
Product Name: Pocket Belt Bag Waist Pack And Crossbody
Color: Steel Grey Twill
Price: $99.95
Rating

Kipling - Gabbie S. Color Tender Grey. $98.95.

Brand Name: Kipling
Product Name: Gabbie S
Color: Tender Grey
Price: $98.95
Rating

Baggallini - Modern Everywhere Slim Crossbody. Color Sterling Shimmer. Low Stock. $95.00. 4.6 out of 5 stars

4 left in stock

Gray Baggallini Modern Everywhere Slim Crossbody

Brand Name: Baggallini
Product Name: Modern Everywhere Slim Crossbody
Color: Sterling Shimmer
Price: $95.00
Rating: 5Rated 5 stars out of 5(181)

Baggallini - On Track Zip Crossbody with RFID Phone Wristlet. Color Sterling Shimmer. $95.00. 4.7 out of 5 stars

Gray Baggallini On Track Zip Crossbody with RFID Phone Wristlet

Brand Name: Baggallini
Product Name: On Track Zip Crossbody with RFID Phone Wristlet
Color: Sterling Shimmer
Price: $95.00
Rating: 5Rated 5 stars out of 5(143)

Baggallini - Avenue Tote. Color Charcoal. Low Stock. On sale for $91.00. MSRP $130.00.. 4.5 out of 5 stars

5 left in stock

Brand Name: Baggallini
Product Name: Avenue Tote
Color: Charcoal
Price: $91.00MSRP: $130.00
Rating: 5Rated 5 stars out of 5(207)

Baggallini - Criss Cross Bagg. Color Charcoal. $89.99. 4.3 out of 5 stars

Brand Name: Baggallini
Product Name: Criss Cross Bagg
Color: Charcoal
Price: $89.99
Rating: 4Rated 4 stars out of 5(277)

HOBO - Rubie Crossbody. Color Nightshade. Low Stock. On sale for $89.68. MSRP $188.00.. 5.0 out of 5 stars

6 left in stock

Brand Name: HOBO
Product Name: Rubie Crossbody
Color: Nightshade
Price: $89.68MSRP: $188.00
Rating: 5Rated 5 stars out of 5(1)

Baggallini - Go Bagg with RFID Phone Wristlet. Color Sterling Shimmer. Low Stock. $85.00. 4.5 out of 5 stars

3 left in stock

Gray Baggallini Go Bagg with RFID Phone Wristlet

Brand Name: Baggallini
Product Name: Go Bagg with RFID Phone Wristlet
Color: Sterling Shimmer
Price: $85.00
Rating: 5Rated 5 stars out of 5(61)

Baggallini - Modern Everywhere Half Moon Crossbody. Color Sterling Shimmer. Low Stock. $85.00. 4.5 out of 5 stars

5 left in stock

Gray Baggallini Modern Everywhere Half Moon Crossbody

Brand Name: Baggallini
Product Name: Modern Everywhere Half Moon Crossbody
Color: Sterling Shimmer
Price: $85.00
Rating: 5Rated 5 stars out of 5(2)

Baggallini - Big Zipper Bagg. Color Charcoal. Low Stock. $84.99. 4.5 out of 5 stars

3 left in stock

Brand Name: Baggallini
Product Name: Big Zipper Bagg
Color: Charcoal
Price: $84.99
Rating: 5Rated 5 stars out of 5(206)

Kipling - Asseni S. Color Tender Grey. On sale for $80.83. MSRP $99.00..

Brand Name: Kipling
Product Name: Asseni S
Color: Tender Grey
Price: $80.83MSRP: $99.00
Rating

Baggallini - Modern Pocket Crossbody. Color Heather Grey Neoprene. Low Stock. $80.00. 4.7 out of 5 stars

5 left in stock

Brand Name: Baggallini
Product Name: Modern Pocket Crossbody
Color: Heather Grey Neoprene
Price: $80.00
Rating: 5Rated 5 stars out of 5(96)

Baggallini - Everywhere Bagg. Color Charcoal. Low Stock. On sale for $77.00. MSRP $110.00.. 4.6 out of 5 stars

3 left in stock

Brand Name: Baggallini
Product Name: Everywhere Bagg
Color: Charcoal
Price: $77.00MSRP: $110.00
Rating: 5Rated 5 stars out of 5(636)

Baggallini - New Classic Uptown Bagg with RFID Phone Wristlet. Color Sterling Shimmer. Low Stock. $75.00. 4.4 out of 5 stars

1 left in stock

Gray Baggallini New Classic Uptown Bagg with RFID Phone Wristlet

Brand Name: Baggallini
Product Name: New Classic Uptown Bagg with RFID Phone Wristlet
Color: Sterling Shimmer
Price: $75.00
Rating: 4Rated 4 stars out of 5(230)

Kipling - Izellah Handbag. Color Grey Gris. Low Stock. On sale for $71.54. MSRP $99.00..

4 left in stock

Brand Name: Kipling
Product Name: Izellah Handbag
Color: Grey Gris
Price: $71.54MSRP: $99.00
Rating

Fjällräven - Sling. Color Graphite. $69.95. 4.8 out of 5 stars

Brand Name: Fjällräven
Product Name: Sling
Color: Graphite
Price: $69.95
Rating: 5Rated 5 stars out of 5(37)

Hedgren - Even - Handbag RFID. Color Fumo Grey. Low Stock. On sale for $68.63. MSRP $125.00..

2 left in stock

Brand Name: Hedgren
Product Name: Even - Handbag RFID
Color: Fumo Grey
Price: $68.63MSRP: $125.00
Rating

MICHAEL Michael Kors - Jet Set Charm Large East/West Crossbody. Color Heather Grey. Low Stock. On sale for $63.20. MSRP $158.00.. 4.9 out of 5 stars

2 left in stock

Gray MICHAEL Michael Kors Jet Set Charm Large East/West Crossbody

Brand Name: MICHAEL Michael Kors
Product Name: Jet Set Charm Large East/West Crossbody
Color: Heather Grey
Price: $63.20MSRP: $158.00
Rating: 5Rated 5 stars out of 5(7)

Baggallini - Securtex™ Anti-Theft Activity Crossbody. Color Charcoal. Low Stock. $60.00. 4.8 out of 5 stars

10 left in stock

Gray Baggallini Securtex™ Anti-Theft Activity Crossbody

Brand Name: Baggallini
Product Name: Securtex™ Anti-Theft Activity Crossbody
Color: Charcoal
Price: $60.00
Rating: 5Rated 5 stars out of 5(26)

Baggallini - Modern Everywhere Mini. Color Silver Metallic Vegan Suede. Low Stock. $60.00. 4.3 out of 5 stars

6 left in stock

Brand Name: Baggallini
Product Name: Modern Everywhere Mini
Color: Silver Metallic Vegan Suede
Price: $60.00
Rating: 4Rated 4 stars out of 5(57)

Kipling - New Eldorado. Color Tender Grey. $58.95.

Brand Name: Kipling
Product Name: New Eldorado
Color: Tender Grey
Price: $58.95
Rating

Baggallini - Take Two RFID Bryant Crossbody. Color Sterling Shimmer. $55.00. 4.5 out of 5 stars

Gray Baggallini Take Two RFID Bryant Crossbody

Brand Name: Baggallini
Product Name: Take Two RFID Bryant Crossbody
Color: Sterling Shimmer
Price: $55.00
Rating: 5Rated 5 stars out of 5(305)

Fjällräven - Crossbody. Color Basalt. Low Stock. On sale for $54.56. MSRP $65.00..

5 left in stock

Brand Name: Fjällräven
Product Name: Crossbody
Color: Basalt
Price: $54.56MSRP: $65.00
Rating

Kipling - Alvar. Color Tender Grey. Low Stock. On sale for $54.33. MSRP $94.00..

8 left in stock

Brand Name: Kipling
Product Name: Alvar
Color: Tender Grey
Price: $54.33MSRP: $94.00
Rating

Baggallini - Modern Belt Bag. Color Sterling Shimmer. Low Stock. $50.00. 4.3 out of 5 stars

2 left in stock

Brand Name: Baggallini
Product Name: Modern Belt Bag
Color: Sterling Shimmer
Price: $50.00
Rating: 4Rated 4 stars out of 5(14)

Sherpani - Sadie Crossbody. Color Bluff. Low Stock. On sale for $48.00. MSRP $60.00..

2 left in stock

+2 colors/patterns

Brand Name: Sherpani
Product Name: Sadie Crossbody
Color: Bluff
Price: $48.00MSRP: $60.00
Rating

GUESS - Giully Mini Convertible Crossbody Flap. Color Grey Multi. On sale for $45.83. MSRP $98.00..

Gray GUESS Giully Mini Convertible Crossbody Flap

Brand Name: GUESS
Product Name: Giully Mini Convertible Crossbody Flap
Color: Grey Multi
Price: $45.83MSRP: $98.00
Rating

Baggallini - Triple Zip Bag. Color Charcoal. On sale for $41.25. MSRP $55.00.. 4.6 out of 5 stars

Brand Name: Baggallini
Product Name: Triple Zip Bag
Color: Charcoal
Price: $41.25MSRP: $55.00
Rating: 5Rated 5 stars out of 5(690)

Herschel Supply Co. - Heritage™ Crossbody. Color Raven Crosshatch. $40.00. 5.0 out of 5 stars

Gray Herschel Supply Co. Heritage™ Crossbody

Brand Name: Herschel Supply Co.
Product Name: Heritage™ Crossbody
Color: Raven Crosshatch
Price: $40.00
Rating: 5Rated 5 stars out of 5(1)

Carhartt - Crossbody Snap Bag. Color Gray. $39.99. 4.2 out of 5 stars

Brand Name: Carhartt
Product Name: Crossbody Snap Bag
Color: Gray
Price: $39.99
Rating: 4Rated 4 stars out of 5(4)

Fjällräven - Pocket. Color Dark Grey. Low Stock. $39.95. 4.6 out of 5 stars

1 left in stock

Brand Name: Fjällräven
Product Name: Pocket
Color: Dark Grey
Price: $39.95
Rating: 5Rated 5 stars out of 5(51)

Kipling - Jona FC Crossbody Handbag. Color Grey Gris Ja23. Low Stock. On sale for $39.60. MSRP $99.00..

6 left in stock

Brand Name: Kipling
Product Name: Jona FC Crossbody Handbag
Color: Grey Gris Ja23
Price: $39.60MSRP: $99.00
Rating

Herschel Supply Co. - Retreat™ Sling Bag. Color Raven Crosshatch. Low Stock. On sale for $37.80. MSRP $60.00.. 2.0 out of 5 stars

1 left in stock

Gray Herschel Supply Co. Retreat™ Sling Bag

Brand Name: Herschel Supply Co.
Product Name: Retreat™ Sling Bag
Color: Raven Crosshatch
Price: $37.80MSRP: $60.00
Rating: 2Rated 2 stars out of 5(1)

Baggallini - Clear Stadium Belt Bag. Color Sterling Shimmer. Low Stock. $35.00. 5.0 out of 5 stars

9 left in stock

Brand Name: Baggallini
Product Name: Clear Stadium Belt Bag
Color: Sterling Shimmer
Price: $35.00
Rating: 5Rated 5 stars out of 5(1)

Herschel Supply Co. - Classic™ Crossbody. Color Light Grey Crosshatch. Low Stock. $35.00.

6 left in stock

Gray Herschel Supply Co. Classic™ Crossbody

Brand Name: Herschel Supply Co.
Product Name: Classic™ Crossbody
Color: Light Grey Crosshatch
Price: $35.00
Rating

Fjällräven - High Coast Pocket. Color Shark Grey. Low Stock. $34.95. 4.2 out of 5 stars

9 left in stock

Brand Name: Fjällräven
Product Name: High Coast Pocket
Color: Shark Grey
Price: $34.95
Rating: 4Rated 4 stars out of 5(20)

Sherpani - Rogue Mini Crossbody. Color Bluff. Low Stock. On sale for $28.80. MSRP $36.00..

5 left in stock

Brand Name: Sherpani
Product Name: Rogue Mini Crossbody
Color: Bluff
Price: $28.80MSRP: $36.00
Rating

Women's Cross Body Gray Handbags

Your Selections

Search Results

Get on the List

About Zappos

Customer Service

Resources

Explore Zappos