Score the best protection and style points too with the Trident Composite Helmet. With trusted technology and a sleek design, it’s built to meet the needs (and wants) of the most demanding boaters. WRSI stands for Whitewater Research and Safety Institute, an organization founded to advance whitewater safety awareness and technology. Shell material: carbon composite. Liner material: removable, replaceable padded liner. Vented: no. Adjustment: interconnect retention system. Ear coverage: no.