Vela vest technology from another tough sport the incredible light weight and compactibility of the vela vest comes from leading sailmaking fabric from americas cup racing this wind and waterproof fabric uses dyneema yarns for near bulletproof strength youve seen dyneema as the white core yarns in rock climbing ropes and its also used in bulletproof vests this fabric comes straight from sailing where ultralight weight and extreme tensile strength come together in a sport where cost doesnt