Solid Core Roller Mini - GreyThe CORE Foam Roller uses high density EVA foam in an exclusive GRID pattern to deliver moderate compression for a comfortable total body massage. Ideal for anyone new to foam rolling, in need of softer compression, or recovering from an injury, it aids in muscle recovery, improves flexibility, and enhances mobility. GRID pattern technology makes it the only solid foam roller on the market to channel blood and oxygen while you roll Multi density