Natural Cork Octagon Yoga Blocks Brick Exercise 2 pcs Set Eco Non-SlipIf yoga, Pilates, or even stretching is a part of your fitness routine, this two piece set of natural cork yoga blocks from Randy & Travis Machinery is a must have. Their high breathability resists sweat, while the cork itself provides a firm yet forgiving surface to balance on and lean against as you run through your routine. Not only are cork blocks more durable than foam, but they're also incredibly stable thanks to the traction they provide.