Designed for safer city travel, the RiutBag was designed and built with all the zippers facing your back, so some creep on the train can’t reach in & steal your stuff. The bag was tested (& approved) by 1000 Kickstarter backers before the final design was approved. It is available in 2 sizes: a 15-liter pack & a slimmer 10-liter size, both carry a 15” laptop & A4 documents.