First aid for the back:the First Aid Pack (contents not included) was designed for outdoor use.The First Aid Pack has a carrying system and waist strap so it can also be taken to locations that are difficult to access.FEATURES:- Ergonomically formed, padded shoulder straps.- Handle.- Large main compartment with functional divider.- Universal loops at both sides.- Front pocket with zipper.- 3M® reflective safety tape.- Without contents.- Transparent pouch for name tag.SPECIFICATIONS:-Measurements:45 x 37 x 22 cm.Volume:20 l.Weight:650 g.Fabric 1:420 HD Nylon.