Under Armour Base Layer 2.0 Crew

From Sportsman's Guide

The Under Armour Base Layer 2.0 Crew is the lightweight, flexible, breathable layer you need for any outdoor pursuit. The soft brushed interior uses a grid pattern to trap air next to your body to keep you warmer. It's also fast drying and sweat wicking so you stay dry and warm if you work up a sweat. 91% polyester, 9% elastane offers improved stretch and a softer, smoother hand feel Lightweight, flexible and breathable Odor control technology effectively neutralizes odor Soft, brushed grid interior traps air managing your body's microclimate Material wicks sweat and dries really fast 4-way stretch material moves better in every direction