Seams: Flatlock Fabric: Main Body / 3mm Neoprene Fabric: Arms & Shoulders / 2mm Floflex Neoprene Single Lined Torso Glide Skin Collar Pk Plastic Zip Duratech Knee Pads   Great Spring / Summer wetsuit, great for all types of water sports such as sea swimming, kayaking, paddling boarding and much more!