The Gul Evotherm Thermal Rash Vest in Black is made with a flatlock seam construction. The Evotherm fabric soft thermal fleece inner which is made from plush Spandex fabric means this Rash Vest will keep you nice and warm when in the water. There is a water repellant outer that helps shield you from splashes and rain. Other features include a UV Shield which provides UPF 50+ sun protection and thumb loops.Product Information:• Product Code: EV0049S21-BKBK• Flatlock seam construction.• Evotherm fabric soft thermal fleece inner - mad from plush spandex fabric.• Water repellent outer.• UV Shield offers UPF 50+ protection.• Thumb loops.