... 80porel/20combed cotton,65porel/35combed cotton, 60Bamboo/40porel Porel is a fiber with high performance and is hollow. The hollow ... channels can make fiber fluffier, and fix more still air, forming a unique heat-preservation system to increase the thermal insulation ... fiber layers are all-weather fabrics, and they can provide a soft, moisture, dry, warm clothing environment whether indoors or ...