The slim-fit Men’s Summit Series FUTUREFLEECE™ LT ½-Zip features a low-pile version of our full-loop fabric technology that helps minimize weight and optimize body temperature. It’s designed to be worn over a base layer or under whatever insulation the mission calls for. Under-pack comfort is also prioritized with flat-locked stitching and no shoulder seams. Features: Clean-Finish Front Hem With Flat-Sewn Elastic On Back Flat-Locked Stitching In Key Zones For Next-To-Skin Comfort Futurefleece™ Lt Features Lower-Pile Full-Loop Construction And Octa-Yarns To Provide An Optimal Warmth-To-Weight Ratio Raglan Sleeves And Stretch Underarm Gussets For Increased Mobility Fabric Made With 37% Recycled Polyester Flat-Sewn Elastic Cuffs With Integrated Thumb Loops No Shoulder Seams For Added Comfort And Reduced Bulk While You’re Wearing A Pack Reverse-Coil, #3 Center Front Half Zip