YogaRat Yoga Blocks: One or Two Block Sets, Solid or Two Tone Color, Lightweight, Comfortable EVA Closed Cell Foam 9" x 6" x 4" Eco-Friendly, Nontoxic EVA foam Non-absorbent and microbiostatic (microbe resistant) Great for fitness trainers and private yoga instructors Softer to the touch than many other yoga blocks Easy to clean