This yoga block is made of cork. It allows you to keep a perfect position and improve your flexibility. Sustainable firmness cork Non-slip surface Rounded corners for optimal comfort With dimensions of 10cm x 15cm x 22.5cm (4 in x 6 in x 9 in), this yoga block allows you to keep your position. Material: made of 100% cork Maintenance : Wipe clean with a damp cloth. if needed use an organic cleaning solution. Sponge or air dry.