New Mens LavaCore Short Sleeve LavaSkin Shirt (4X-Large) with Front Zipper for Scuba Diving, Surfing, Kayaking, Rafting, Paddling & Many Other WaterSports (Navy Blue/White) UPF 50+ protection Short Sleeve Shirt with 1/3 front zipper Polytherm Trilaminate Torso Polytherm Polyester/Fleece Side Panel w/o Membrane Neutrally Buoyant