j/fit Ultra Foam Roller, Purple, 6x36-Inch Relieves aches and pain associated with sitting at a computer all day; Made from 100% medical grade foam with no fillers Breaks downs knots that limit range of motion; 6" diameter x 36" length Increases blood flow to the soft tissue to help release muscle tightness Provides targeted, trigger point massage and a great overall muscle massage Helps speed post-exercise recovery and preps muscles for stretching