A versatile, waterproof bike bag that fits A4-sized documents and a 15.4laptop. The removable padded backpack strap system packs into the zippered front pocket when cycling. QL3.1 mounting system: Purchase a separate [QL3.1 mounting kit](https://scandinavianoutdoor.com/ortlieb/varusteet/laukut/pyoralaukut/ql31-mounting-set/?currency=eur&delivery_country=fi), install it on your bike rack, and click the Back-Roller Free bag on and off with record-breaking convenience! (In previous model years, the kit was included with the bag, but now it is sold separately). - Thanks to QL3.1, the bag itself has no bulky hooks - Adjustable bag position and placement via the mounting rail - Easy to open and close with roll-top closure - Two zippered exterior pockets (not waterproof) - One interior pocket - Two side reflectors - Helmet attachment point - Waterproofno worries about your phone or laptop getting wet! - 5-year warranty By ordering this product, you will receive one bag. Many Ortlieb p