No nasty chemicals in this synthetic rubber mat. biodegradable. Dark blue and dark purple - reversible. 173 cm x 61 cm x 0.3 cm thick. Comes with its own carry strap. Also available in  Black/Grey - 183 x 61 x 0.4 cm. 100% TPE- Thermal Plastic Elastomer. Non-toxic, PVC-free, Chlorides-free, Light weight, Superior-grip in wet and dry,High elasticity and resilience. Water-repellent and cold-resistant, recyclable and reusable to avoid environmental pollution and reduce junk. Proven to have better performance than any PVC mat yet still remain environmentally friendly.