Now Available: Vital Performance. The Vital Air-Flex Drop Arm Tank features our Air-Flex DNATM Technology engineered with ultra-soft and lightweight semi-synthetic beech tree pulp (aka modal) fabric that provides the ideal fit and drape to enhance your shape. 4-way stretch, superior breathability, and moisture-wicking properties. Shop the drop link in bio. #TLF #TLFmen #Vital