Technology from another tough sport the incredible light weight and compactibility of the vela vest comes from leading sail making fabric from americarsquos cup racing this wind and waterproof fabric uses dyneemareg yarns for near bulletproof strength and durability yoursquove seen dyneemareg as the white core yarns in rock climbing ropes and itrsquos also used in bulletproof vests this fabric comes straight from sailing where ultralight weight and extreme tensile strength come t