Protect your core temperature with our men's thermal tops and shorts. Add them as an extra layer under your wetsuit for extra protection in cold water, or use them as a warm baselayer when kayaking, sailing, or on your SUP. The thermal layer will help keep you warm, and also acts as a protection against chafing, like a rash vest. The thermal layer will help keep you warm, and also acts as a protection against chafing, like a rash vest.