Cork is an environmentally friendly material, so it makes sense for the eco-conscious yogi. Our 3? Cork Yoga Block is made from 100% natural cork. Each yoga block is sturdy and solid, with beveled edges for added comfort. Cork has a natural texture that provides extra traction, giving your to confidence you need on your yoga mat. This block is 3'' x 6'' x 9'' (also available in 4'' design).