ProSource Foam Yoga Blocks provide support and help extend your reach in challenging yoga poses. Ideal for beginners or anyone trying to increase flexibility REACH FURTHER - Provides assistance for getting into exercise poses safely, extend-ing your reach, and working toward greater flexibility. A must have accessory for yoga practice. REDUCE INJURY - Reduces the chance of injury and muscle strain by offering sturdy, non-slip support for proper body alignment LIGHTWEIGHT - Flexible high-density foam offers a non-stick surface; the lightweight design (5.6 oz. each) is great for travel and carrying GRIP & COMFORT - Solid structure, contoured edges, and a soft surface ensure optimal grip and comfortable stability SET OF 2 - Comes in a set of 2 large blocks, size 4x6x9; available in a variety of colors to suit your style