Crown Sporting Goods Large High Density Foam Yoga Block Made using the highest quality materials Tested for durability Designed to be safe and unique Safely support and modify your poses: reach deeper, hold postures longer and with more control Durable, lightweight foam: soft exterior with beveled edges for superior comfort High density, studio quality and size: 9" x 6" x 4" Accommodates your level of flexibility: great for beginners and experienced yogis Easy to use: No-stick surface