Well, um, we just told you everything you need to know. This has all the features of the B.P in a HappyFit cut producing a slightly wider ride for the more traditional body shape. Engineered for maximum impact protection while the TrueFit Liner moves along with your body and the vests outer layer in perfect harmony for a comfortable, friction free ride. The Duraprene Neoprene material & acute angle cross stitch vest works with the complete stitch through segment panels for the perfect movement and fit.