Strong compressive resistance. 3/4 4/4 adjustable. Wonderful workmanship. Velcro Neck Straps & Padded Neck Restraint. Compartment room for Rosin & Accessories. Buckle for Secure Closure. Weight 2.3-2.5kg. The shoulder straps designed for comfort, according to the structure of the human body. detachable Music score Bag. If you need other case or bag. Please contact me. thanks.