The Syncro Wetsuit from Roxy is warm light and flexible, it features a thermal lining on back panel that transforms body heat into infrared energy to generate and maintain warmth.Product Information: Product Code: ERJW103055-XKKK 100% StretchFlight x2 limestone-derived neoprene - warm, light & flexible Thermal Smoothie on back panel - retains heat and blocks wind WarmFlight® x1 Far-Infrared thermal lining on back panel transforms body heat into infrared energy to generate & maintain warmth GBS (glued and blind stitched) seams for maximum flexibility and minimal water entry Chest zip entry system with PK® #8 plastic zip Supratex knee pads, durable, lightweight & flexible Suitable for suggested water temperatures of 11°C - 14°C / 51°F - 58°F Drainage holes Weight: 1.13 kg 83% Nylon, 17% Elastane