New, two-piece (separate top and bottom) wetsuit, a complete set. Thickness: 3mm Material: 90% Neoprene, 10% Nylon Size: Men's M (Height 165-172cm, Weight 52-60kg) I personally use this wetsuit for diving. It's made of a softer material compared to other wetsuits, making it comfortable. The material is stretchy, so it's possible to wear it even if you're not within the "Height 165-172cm, Weight 52-60kg" range, but the following situations may occur: * If you are smaller, there will be more space between the wetsuit and your body, reducing heat retention. * If you are larger, the wetsuit will fit more snugly, but it will be more difficult to put on and take off.