Yoga wedges made from fully renewable, environmentally friendly cork. Cork is the bark of a tree and harvested without cutting the tree down. By purchasing cork products you"re helping to sustain the cork oak forests.These yoga wedges are used to support yoga postures. They are often used under your heel for bending or under wrists to relieve joint pressure. The are helpful when working to extend your stretches (for example, under the ball of your foot). An important prop for developing posture coordination and stability.