This Yoga mat is filled with cotton and felt batting. The batting is packed to provide solid support, and yet is soft and comfort. Optional The outer cover (if selected) is made of a 100% cotton fabric and has a zip along one length so that it can be easily removed and washed. Inside the cover, the batting is enclosed in a casing. Two ties are included for easy roll-up and storage. Overall length is 195cm by 3cm thick.