Inflatable boat bladder surrounded by foam cushion

摘要

Alternative collar assemblies (10) for use with watercraft including rigid-hulled boats are described. The collars may include both foam materials (18) and one or more inflatable compartments (14), thereby offering multiple advantages over existing foam or inflatable collars. Optionally included in or on the collars are reinforcing material (such as but not limited to Kevlar) and an abrasion-resistant coating (22) surrounding the foam and inflatable compartments.