Durable Supportive Foam: Made of closed cell high-density EVA foam, Heathyoga Yoga Blocks provide you with reliable support and long-lasting performance, even under considerable weight. Non-slip Surface & Solid Construction: Slip-resistant surface combined with specially constructed round edges, our yoga blocks ensure a comfortable and steady grip. Measured 3 x 9 x 6 inches each (LxWxH), any side can be used for the perfect height. Extend & Deepen Stretches: Providing the stability and balance, Heathyoga yoga blocks 2 pack set help to extend your stretching, deepen your poses and ensure the optimal alignment. It also comes with a D ring stretching strap to increase your range of motion. Perfect for all types of yoga and other workout exercise, great for overall balance and flexibility.