Quiksilver Boys 4/3mm Syncro Back Zip Full Wetsuit FN lite neoprene packed with air cells for the lightest of lightweight warmth Thermal Smoothie Neoprene: Flexible and wind & water repellent to keep you warmer Warmflight thermal lining - far infrared technology Glued & blind stitched (GBS) seams that reduce sew throughs & water entry to keep you warmer Back zip entry system