Customer Reviews Under Armour UA Base 4.0 Crew

I get cold easily and bought this for a cold weather hunt. It was perfect. Very comfortable and warm, even at a low exertion level.

I bought this for a ski trip to Colorado. It is extremely warm. It is the only shirt I wear under my ski jacket, and I stay very warm. It does run small. I typically wear a medium shirt, sometimes even a small if it's a store like Loft, and in had to order a large.

This is a great shirt. It is soft and warm. The quilting is insulating but layers still fit over this base layer just fine for me. It was important that I got the shirt in my true size (not size up if between sizes). If I were to size up, the shirt would be too bulky. The thumb holes are great. Love this!

I bought these with the matching pants for an outdoor adventure. The weather was in the 20's most of the time and these worked great! I wore a sports bra, this thermal, a fleece jacket, and a waterproof light snow jacket with hood and I was fine the whole time. We were outside all during the day and I felt great. This thermal is everything!! I especially LOVE that the sleeves have a thumb hole. This keeps your sleeves from bunching up and makes it a lot, a lot easier to put your jacket on. It's a shame the guys thermal doesn't have the thumb feature. I would buy them again in a minute. I bought a Medium, since that's what I bought in the pants and it was a good fit!

I normally wear a large shirt so that is what I ordered. I understand that this should be tight against your skin for optimal performance but it was uncomfortably tight in the armpit area. I exchanged it for the extra large and it still was a little tight but wearable. I haven't worn it in the bitter cold/wind yet but it appears to be very warm. Can't wait to try it out!

I bought it for snowmobiling and it keeps me warm, whether it's plus5 or 35 below.