XCEL Hawaii 4/3 Infiniti X-Zip2 Wetsuit - Men's Water-resistant Interlock zipper on front outer flap Durable ULTRASTRETCH Pressure Bonded taped seams in lower body THERMOCARBON inner chest and lower body Heat-retaining lining made of bamboo charcoal infused fibers and recycled fibers Abrasion-resistant, flexible fibers that minimize wear-and-tear from on/off and leashes