2 year waterproof warrantyfootjoy warrants that this piece of outerwear will be waterproof in normal use for two years hydrolite systemthe hydrolite system is a 100 waterproof shell combining lightweight fabrics with a bonded liner makes this dryjoys piece the lightest garment ever produced by fjstorm flapa storm flap is located along the outside and inside of the zipper to provide additional protection from the elements four way stretch fabricthis performance fabric offers extrem