The Typhoon Lightweight Undersuit is ideal for surface use or for diving in warmer waters. The Thermofibre fabric is slightly stretchy which allows a good range of movement under all suits. Elasticated ankle loops ensure that the legs don't ride up when donning a suit while elasticated thumb loops do the same for the arms. The Typhoon Lightweight Undersuit features a double front zip which allows the suit to be donned easily and allows comfortable routing of a p-valve hose if necessary. It is thin enough to be worn under tight fitting neoprene suits and is more than enough insulation for the warmer months, it can also be combined with other undersuits for extra warmth in colder waters.