Deluxe PER Yoga Mat:Color&ndsh;Royal Blue For those who want a more eco&ndsh;friendly mat,our fantastic Deluxe PER Yoga mat is now environmentally friendly. We call it Clean PVC™ an eco friendly yoga mat made of PER,which is a unique material that is more sensitive to the environment and your health than yoga mats made of standard PVC foam. This mat does not contain toxic phthalates,dioxins and furans,phenal,or heavy metals and has a ecologically safer method of production which is better for the workers and the environment and most importantly it performs great for all types of yoga with excellent traction and cushion!