yarn count: 20S, 32S, 40S specs: 100%porel, 80porel/20viscose,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 performance of fiber. Meanwhile, the fabric will lighter and more ...