Yoga Studio Cork Yoga Mats are biodegradable, made with Rubber and Cork -No toxins, metals, chemicals or nasties! – Both sides on the mat can be used. You can use the Rubber surface as practice side, or the Cork surface as the practice side. No break in period required – Providing excellent grip from the first use. Superior cushioning for your joints. Lays flat and will not bunch or roll during practice. Free Yoga Mat Carry Strap Included. Sustainable, Ethical, Ecological and Antimicrobial. Size Dimensions: 183 x 64 x 4mm, Weight: 2.4kg.