Yoga Knee Mat, Cushions Knees & Elbows for Extra Support During Your Yoga Practice, 12" X 23" Oval, 10mm Thick The Yoga Mat can be used alone or with any standard yoga mat. Non-slip ridges and moisture resistant surface for a safe and comfortable workout. Adds foam cushioning to your joints for the ebst workout. Made of lightweight maerial. Easy to carry and clean.