The Roxy Women's Swell Series 4/3 Back Zip Wetsuit is constructed for immense warmth and protection through StretchFlight and thermal lining. Roxy created this suit using Xtra-stretch tape, GBS glue, water-based glue, and GlideSkin. These features combined created a high-performance masterpiece. Roxy is also using Recycled polyester and nylon for the lining of the Swell Series to lower environmental impact.