The Simms Men's Thermal Quarter-Zip Top is touted as the venerable angling manufacturer's warmest mid-layer for adding warmth on its own or when worn under a jacket. Its grid-fleece interior traps heat next to your skin without adding any annoying bulkiness that limits your range of motion, which is a blessing in itself. The Simms Thermal Quarter-Zip mid-layer pullover is made with a smooth exterior for seamless layering purposes, and the high-collar quarter-length zipper provides venting if you want it. You'll always get reliable comfort and the right look with this Simms Men's Thermal Quarter-Zip Top! Material: 255 gsm 93% polyester and 7% elastane finished with antimicrobial and moisture managementSmooth-faced grid-fleece layers perfectly with Simms base layers to provide maximum warmthHigh collar with a quarter-length zipper allows for venting and easy on and offImported Size Chest (in.)* Neck (in.)* Sleeve (in.)* S 36 - 38 15 1/2 - 16 33 - 34 M 39 - 41 16 - 16 1/2 34 - 35 L 42 - 45 16 1/2 - 17 35 - 36 XL 46 - 48 17 1/2 - 18 36 - 37 2XL 49 - 51 18 1/2 - 19 37 - 38 3XL 52 - 54 19 1/2 - 20 37 - 38 4XL 55 - 57 20 1/2 - 21 37 - 38 *Body Measurements