The Xcel Axis Womens back zip 5/4mm winter wetsuit features 100% superstretch Japanese limestone Superprene. It has a plush polypropelene thermo lite internal lining for warmth. Glued and blindstitched waterproof seams with internally fusion taped stress points and a watertight back zip. The Axis is our warmest 5/4 Back zip and looks amazing in blue tie dye.