Robust and durable. Durable material made from rubberised, water-repellent fabric make the EXPLORER bicycle bag a must for every mountain biker. Reflective elements like the SKS logo add safety. Besides providing plenty of space for tools, replacement tubes, and personal items, this bag features a laminated zipper with ergonomic easy-zip, secure inside pocket, and orange-coloured lining to make finding items easier. ROBUST SADDLEBAG WITH A HOOK AND LOOP FASTENER • Durable hook and loop fastener • EASYZIP • Robust outer material • Water-repellent • Reflective SPECIFICATIONS Easily removable EASYZIP Reflective strips for more safety on the road Resistant upper material Water repellent Dimensions: 160 x 70 x 110 mm Volume: 800ml Weight: 137 g FAQ Can I use this with my dropper post? Unfortunately these bags also strap on the seatpost itself - which on a dropper would be the stanchion. Unless you only use 50% of your drop, and never go near the bottom, I would say this is not dropper post compatible. Can I use this with a pannier rack? Yes, its a good idea to check clearance, but they should fit on your bike together.