Description The Thermo-X t-shirt is for those who want a little extra warmth on those cool days. The t-shirt can be used under a wetsuit, but can also be used alone. The t-shirt is made of a technical heat-giving material and also comes with UPF 50+, which means maximum protection against the sun's UV rays. Ideal for surfing, kayaking, SUP, sailing and other water activities. Comes with a combination of flatlock and strategic stitching, which provides maximum comfort and flexibility. Specifications 4-way stretch Water-repellent Strategic stitching Thermo-X Hyperdry Flatlock seams Ergonomically correct stitching 220g Nylon/Spandex