Being out on the water is fun, we all know that but, having your phone, camera or other important gear with you that you don't want to go for a swim is dangers and thats why keeping it save is paramount. Bloc's Waterproof Back Pack's are the perfect solution. The packs feature a roll down closure and welded seams. It's made using a 0.5mm durable 500D PVC material which is ideal for the wet. What makes it a bag pack, is its straps and they have fully adjustable shoulder straps.