RiutBags are backwards backpacks for secure urban travel. Urban travellers can travel with valuables without concern about theft and loss. RiutBag Crush has two unique features: 1) Security: It is backwards. The person behind you cannot open it because all the zips are against your back. 2) Super light: It is so light - made from hot air balloon material it's under 250grams - that it can crush down into an internal pocket. These two features make the RiutBag Crush a secure and light backpack for safe urban travel, at home and abroad.