How to Choose Base Layers

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Designed to keep you warm and wick away moisture, the REI midweight half-zip base layer is ideal for high-performance cold-weather outdoor activities.
Shop newer version| Best Use | Multisport |
|---|---|
| Shirt Type | Partial-zip |
| Fabric | Polyester |
| Sun-Protective Fabric | Yes |
| UPF Rating | 50 |
| Moisture Wicking | Yes |
| Quick Drying | Yes |
| Underwear Weight | Midweight |
| Sleeve Length | Long Sleeve |
| Gender | Men's |
| Sustainability | From a Climate Label Certified brand |
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Very comfortable, being just snug enough to look fitting but loose and stretchy enough to keep you from feeling constrained. The perfect weight and thickness for what I was looking for.
I bought this item in preparation for a hike on the Oregon portion of the PCT and decided to try it on a local hike on the Oregon coast on a cold and windy day. This item kept me warm and was a pretty solid windbreaker also. Doesn't over heat you either. I can't recommend this item enough.
This is called a mid-weight shirt. What that means is that you cannot read a book through it like you can with many flimsy under layer tops. It didn't shrink when I washed it. (Yes some of the REI poly fabrics shrink and I don't know why). The fit is reasonable although true-to-size fit seems to be a thing of the past. So all in all it's pretty good
I travel allot on airplanes and needed a light weight pullover, this is perfect. Doesn't wrinkle and fits nicely. Wish it had a small pocket. I'll use this winter as a base layer for skiing.
Well made mid weight base layer. Excellent construction. I would recommend highly.
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.

