$50 · Pacsafe Backpack and Bag Protector - 22 to 55 Litre

This bag protector is brand new and has never been used The wire net wraps over your pack and gear to deter thieves from slashing your pack. The padlock and locking system also allow your stuff to be secured to a post or other fixed object. - Wire net folds to a convenient, compact size of 15 x 10 x 4cm - High-impact-resistant polycarbonate locking system, complete with keys and lock - Secures a daypack, sleeping bag, or hiking boots outside your pack - Comes with carrying case - Size Small fits packs 22-55L - If you don't know your pack volume, multiply length x width x height in centimetres of your pack. Divide that number by 1000 for the approximate volume (e.g., 30,000cm³ is a 30L pack), and choose the Pacsafe to fit that volume.