SCALABLE LARGE CAPACITY: This bike bags for bicycles rear rack is constructed with one main compartment and two side bags, which is all extendable. The capacity of the expanded bicycle bag is increased from 10L to 25L, which can meet more daily necessities required during cycling travel.

MULTI-FUNCITIONAL BIKE BAG: It could be used as a bike trunk bag; As a saddle rack bag by unzipping; There is a handle on the top of the bicycle bag, which can be used as a handbag .

DURABILITY & WATER RESISTANCE: Made of high quality dacron fabric, scratch-resistant and durable. There is a rain cover in the package, and the waterproof performance is upgraded. Even in rainy and snowy weather, it can keep the contents of the bike bag dry.

COMPATIBLE WITH TAIL LIGHTS & WATER BOTTLE HOLDERS: The tail of this bike bag has a bag for water bottles and a strap for linking with tail lights, which is used to install warning lights to increase the safety of night riding

STRONG AND EASY TO INSTALL: This bike bag is very easy to install, there are two Velcro straps at the bottom for fixing, it only takes three steps to securely install the bike bag on the bike rack.

Item is an amazon return product and appears to have no issues bag is new and came in an open package.  sold as is