These chipped foam blocks are almost the same as our regular blocks but may not adhere strictly to the standard sizing specification (the variance may be more than 3mm). Made from densely compressed chipped foam, using offcuts from manufacturing other foam products, the colour varies from batch to batch, but is always of mottled / multicoloured appearance. The 12lb density of these chipped foam yoga blocks makes them the firmest chipped foam block available. (cheaper foam blocks lack the density and durability of these). Blocks enhance your practice by supporting, stabilising and aligning the body. Sit on one to raise your hips for a straighter spine, or put four together for a classic shoulder stand support.