The North Face Quantum Crew will allow you to push yourself further with the accelerated cooling and fast drying performance of FlashDry XD fabric. . Lightweight polyester knit jersey fabric with FlashDry XD. FlashDry XD: Extremely durable, highly abrasion and snag resistant fabric accelerates the removal of moisture from the skin and speeds evaporative drying to keep you comfortable. Reinforced bonded seams for durability. Flatlock stitching throughout for chafe free comfort and a smooth fit. Athletic detailing. Contrast logo. Center back length: 28.5 in..