Blue Seventy Men's Reaction Full Sleeve Wetsuit - 2015 REACTIVE STRETCH TECHNOLOGY (RST) A blend of SCS coating, 2mm neoprene and our orange high stretch jersey improves arm mobility, reach and propulsion. SIDE PANELS The new Reaction benefits from 2mm thin Side Panels that begin at the arm gussets and end at the knee. This technology improves fit and body position in the water without sacrificing buoyancy. VO2 CHEST PANEL A central split chest panel allow greater chest expansion and unimpeded breathing. LOWERED COLLAR Over twenty years of wetsuit design experience has made our traditional zipper an industry standard. Our curved closure flap reduces rear collar height improving comfort and reducing chafing. HONEYCOMB FOREARM PANELS Our exclusive honeycomb forearm print allows extra feel for the water and additional propulsion.