HeatGear fabric is ultra-soft & smooth for extreme comfort with very little weight New, innovative NEOLAST fibers provide powerful stretch, durability, comfort & improved wicking NEOLAST is a high-performing alternative to elastane designed to begin addressing sustainability challenges associated with elastane Material wicks sweat & dries really fast 4-way stretch material moves better in every direction Ergonomic design keeps seams off high abrasion areas & increases durability