Customer Reviews Merrell Siren 4 Thermo Mid Zip Waterproof

These are nice warm boots. The zipper makes easy to get on & off. Was glad I got a half size larger. I wish they went up my leg a little more for deeper snow tho

So comfy. Very supportive perfect for chilly days.

I love how light these boots are. We just spent a week in the mountains and they kept my feet warm the entire time. Good grip on snow but I felt they didn't track as well on the more slippery spots. They are comfortable. The reason I only give them 4 stars is I wish the foot bed and arch support were better. My last set of Merrell boots that I bought 10 years ago had much better arch support and comfortable insole. Overall tough, I do really like them. Hope they last just as long as my last Merrell winter boots!

Very warm and comfortable, though I have only used down to 15 degrees so far. Easy to adjust laces to be tighter on the foot and loser in the ankle, which was important for me. Great traction in minimal snow/slush. I walk dogs for my job and these are great for easy on/off and walking in winter.

Just took these on a snowy overnight backpacking trip and they kept my feet toasty warm/dry and I had no issues breaking them in. Traction was also surprisingly good in the snow. Only downside is the sizing - Im a 6.5 or 7 in all other Merrell boots but had to get a 7.5 in these. Glad I tried them on beforehand because the 7 would have been too small. For reference I have average width feet

Light weight & comfy. definitely the best waterproof Iveever had. If we ever have another 10 snow storm, Ill just put my cleats on them & easily hike uphill to go into town for necessities. Wish I had these years ago when I was in college in a VERY snowy part of upstate NY. LOVE rhem!!!

These boots are incredibly narrow and stiff with no option to order a wide size. I ordered a size 10 but these feel more like an 8. Awful. Im returning these.

These were very uncomfortable at first, but once I cut the insole a little and wore them for a while they are now very comfortable! They are not warm however if you like someplace with mild winters these would be ideal, but temperature below freezing really sink through these.

The shoelaces come undone unless you double knot, the zipper unzips and also gets caught when unzipping, and the shoe is wider than expected so it looks too big although length is good. Would not buy again. They are really warm though.

I wore these in the CO chilly, slick weather today, just walking at the park nearby. The pros: They were plenty warm (not overly warm, but just right), and roomy in the toe box, and the tread worked very well on somewhat slippery terrain. Cons: The fit inside the boot is not overly soft/plush, or super comfortable. I'm going to try my inserts and I'm hopeful that will improve the feel. The other noteworthy thing is that on this first walk, the left boot's tongue was painful on the front of my ankle. I will try to move it around because the right one was just fine. I gave them a 3/5 because of the comfort factor (nothing extra to provide comfort/cush on the inside), and the tongue issue. They may end up working out well, and I hope that will be the case!

Although my feet are relatively flat, I don't usually have to order wide. These felt pretty narrow and maybe too arched for me, immediately uncomfortable. It's unfortunate because they're cute with the knit top and I like the height! Some glue was visible on the black fabric as well which didn't look great for the price.

These boots are incredibly narrow and stiff with no option to order a wide size. I ordered a size 10 but these feel more like an 8. Awful. I'm returning these.

I purchased these boots for winter walking, thinking they were solid, and had a good tread for walking on icy surfaces. They were awful. I nearly fell several times, and they weren't supportive. They also didn't keep snow from getting in around the top of the boot. I ended up just giving them away to someone who needed boots. A waste of money!

I wore these in -10 in an area with dry cold and we walked through snow. The snow came close to the top of the boot. My feet were freezing and they were wet inside all around my foot when I took them off. Such a disappointment, especially for the price.

Light weight & comfy. definitely the best waterproof I'veever had. If we ever have another 10" snow storm, I'll just put my cleats on them & easily hike uphill to go into town for necessities. Wish I had these years ago when I was in college in a VERY snowy part of upstate NY. LOVE rhem!!!