Review on 🔲 Large Black Zefal Bag Z Box by Steven Loy

It's basically a hard plastic cylinder with a screw top so it's waterproof. Sweet. I bought the large size, which has a screw-in extension that runs between the lid and the main body. This extension has a bezel that screws in directly over the threads that attach it to the main body. Depending on your preference, you can have an additional separate compartment or simply increase the storage space in the main body. It's simple but smart. However, I didn't need an extension cord. Without them, the tube fits easily into my stock 700c 32 tube, multi-tool, and tube repair kit/tire removal tools. Buttons also work, maybe a small clamshell (tube diameter is too small for my Galaxy S6), but nothing more. For me the size is pretty much perfect. It fits snugly in my bottle cage and is secure enough for road riding, but more aggressive off-road riders will likely need velcro straps or something to keep it from bouncing around. EDIT: I've since removed the bike pump mount and with a Z-Box extension (with the 'bottom' removed) it now holds all of the above plus the bike pump! I love this shop!