The foundational layering-system piece. Wear alone in cool temps or with heavier layering pieces in colder weather. Your first layer of defense in the battle against the brrrrr, the lightweight Strata 160 LS crew keeps you warm, mobile, and ready to fish in a naturally inviting, temperature-regulating wool and synthetic fabric blend. 4-way stretch polyester knit with wool for warmth and moisture management Raglan sleeve construction for ease of movement, breathability, and comfort when layering with other clothing Low-profile flatlock stitched seams for next-to-skin comfort Integrated thumb holes in the sleeve Treated with wicking and quick-dry finish Treated with an anti-microbial finish to prevent odor build-up Fabric Tech: Main: 92% POLYESTER, 8% WOOL stretch knit; Underarm: 92% POLYESTER, 8% Elastane Stretch Jacquard Mesh Size Chest Neck Sleeve XS 33"-35" 13.5" - 14" 32" - 33" S 36"-38" 15.5" - 16" 33" - 34" M 39"-41" 16" - 16.5" 34" - 35" L 42"-45" 16.5" - 17" 35" - 36" XL 46"-48" 17.5" - 18" 36" - 37" XXL 49"-51" 18.5" - 19" 37" - 38" 3XL 52"-54" 19.5" - 20" 37" - 38" 4XL 55"-57" 20.5" - 21" 37" - 38"