Lavacore Men's Long Sleeve LavaSkin Shirt - Grey (Size 4X-Large) Scuba Diving, Surfing, Kayaking, Rafting, Paddling & Many Other WaterSports UPF 50+ protection Long Sleeve Shirt Polytherm Trilaminate Torso Polytherm Polyester/Fleece Side Panel w/o Membrane Neutrally Buoyant