Slightly smaller than a 24 Hour Pack, the SCARAB™ Light Zip-On Back Panel can be used as a quick on/off Pack for sustainment supplies and Hydration. External pocket, internal divider sleeve and hydration bladder sleeve for organization. Color matching Velcro® Brand Loop on the exterior. Hydration Tube port at top. The size of the SCARAB™ Light Zip-On Back Panel corresponds to the size of the SCARAB Light Carrier you purchase. For example, if you purchase a large SCARAB Light Carrier you would purchase a large SCARAB™ Light Zip-On Back Panel. All materials and workmanship are 100% made in the USA.