Storm Defender waterproof, breathable technology stops water from getting in but lets sweat get out, 10K/10K waterproof breathability rating Wind Fighter technology tames the wind Fully-taped waterproof seams, Polyester mesh-lining in body for breathability Full-zip front with inner and outer storm flaps to keep water out Replacing J162. This jacket features Storm Defender waterproof and breathable technology with a 10K/10K waterproof breathability rating. It also includes Wind Fighter technology to tame the wind, fully-taped waterproof seams, and a polyester mesh lining in the body for enhanced breathability. The full-zip front has inner and outer storm flaps to ensure water stays out.