The strength & stability you expect, plus a fun marbled pattern. These were designed with the creative yogi in mind. The 4 in. Marbled Foam Blocks add a gray & white Storm pattern to the best-selling foam block construction. They help you find perfect alignment and feel great to the touch, all while bringing plenty of fun to your practice. These lightweight-but-firm props provide reliable support under your hands, feet, torso, or head. To clean, use a mat & gear wash or wipe the surface down with a warm, wet cloth. Air-dry out of direct sunlight.