Rip Curl Men's Omega 4/3 Back Zip Fullsuit Designed for cooler surf, the Omega 4/3 Back Zip Fullsuit Wetsuit uses durable E5 neoprene and reinforced GB seams. Its 4x3 mm thickness locks in warmth, while the internal key pocket and back zip keep essentials safe, making it your go-to for serious wave riding in colder waters. Composition: 80% Neoprene & 20% Polyamide Neoprene Back zip GB Seam 4x3 mm E5 neoprene E3 neoprene E5 tape Internal key pocket Thickness 4/3mm Entry System Back-Zip Temperature Guide 50 ºF to 63 ºF Sleeve Length Long Sleeve Collection Omega Style Code 15HMFS Warning This product can expose you to chemicals including chloroprene, which is known to the State of California to cause cancer. More information p65warnings.ca.gov