The Bach ’Marching’ Baritone Tubing (Left Hand) Guard covers the bell tube section the left hand palm touches. The guard uses velcro to close around the valves. It is made of the finest quality American leather and of course has our Tripotec Layering System™ to keep the valve section clean and protected from moisture and acids. All guards are handmade here at the shop and inspected before we package them to insure we maintain the high quality our customers are used to in Leather Specialties Guards. Velcro - Leather – Brown