About this item The size is approx 15L(30*20*25cm/ 11.8*7.9*9.8inch), You could take your mobile phone, computer, wallet or tablet computer to work. You can also bring your glasses, clothes, gloves, water bottle, food or other tools to travel. there are 2 inside pockets. Folding brace system, It can be freely adjusted in size according to your needs. Minimum capacity when the basket is closed. Zipper top cover, It protects privacy while preventing things from falling from the basket, avoiding sun exposure, etc. You can also quickly take the phone from the pocket on bag cover. Its material is nylon 900D, which is water resistant. The ordinary bag is only 500D. Its material is very good. It is not waterproof because it is made of needlework. you could use the rain cover in rain day. Convenient, This bag can be carried by hand or shoulder or bike. Safe, with reflective strips on rain cover. it can protect you in the dark. Compatible with Brompton original carrier block and TWTOPSE alloy carrier block. if your bike don’t have it, you need prepare it yourself Max load 15kg.