Wave Storm Poncho BISOWAVE STORM PONCHO BISO Waterproof and windproof on the outside, fluffy and warm on the inside the Biso Storm Poncho is the new best friend of beach goers, open water swimmers, wind surfers and more! The Biso is a size S M so it fits easily over a wetsuit, with a lower hem that comes down to your knees so it functions also as a portable changing room when getting in and out of swimwear or a wetsuit. It also has large, warm side pockets (great for