j/fit High Density EVA Foam Roller with Vinyl Cover, Black, 36-Inch Relieves aches and pain associated with sitting at a computer all day; The EVA roller is the longest lasting roller available 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