Gruv Gear DuoStrap Signature Ergonomic Double Strap for Bass Guitar, Black Leather Minimizes shoulder and back pain by distributing the weight of your instrument. Helps maintain proper playing posture to help lessen hand and wrist injury. Luxurious genuine leather stitched over resilient foam padding for comfort that doesn't dig into your neck. Unique length adjustment system secured by metal screws. Works great for double-cut basses and guitars, with optional adapter to work with single-cut instruments.