This is the 4th Element Men&';s Arctic TOP Drysuit Undergarment - Top ONLY Features: Keeps the body dry and warm Superior low bulk insulation for flexibility Performs even when wet Machine washable Comfortable fit with fleece inner Used by FBI dive teams and military divers world wide The Arctic top is designed with a long body portion to ensure adequate overlap between the top and trousers. Thumb loops prevent the sleeves from riding up during donning (remember to remove them and tuck them back underneath the wrist seals after donning). Tuck the top into the waistband of the trousers before donning drysuit to prevent any separation during the dive.