The new callaway green grass 30 waterproof jacket is 100 waterproof and comes with a 2 year manufacturers guarantee made from 100 polyester this lightweight and durable jacket transfers any moisture away from the body to aid in evaporation its opti stretch fabric incorporates layers of spandex which ensures maximum range of motion so the garment moves with the golf swing other features include an hi lo hem drawcord scorecard pocket adjustable cuffs hidden zip to allow for club cresting