Prolong your performance in our 4/3mm Marathon Sessions Chest Zip Wetsuit. Featuring StretchFlight Eco neoprene foam and a WarmFlight Far Infrared x2 thermal lining for maximum warmth and flexibility, this suit keeps you comfortable in the water for longer. Featured here in the Black colorway. Features Fabric: Nylon elastane blend fabric Neoprene Foam: StretchFlight Eco neoprene foam Lining: WARMFLIGHT ECO INFRARED zoned thermal lining WARMFLIGHT ECO VELVET zoned thermal lining External Seam Details: Liquid Flex Seal (LFS) taped seams for comfort and zero leakage external seams Internal Seam Details: GBS (glued and blind stitched) seams for maximum flexibility and minimal water entry internal seams Thermal smoothie: Front and back panels Thickness: 403 mm Neck: Mock neck Sleeves: Long sleeve Entry: Chest zip entry Glue: Aqua glue eco friendly lamination Other Features: Key loop Recycled yarn