There are stitched braided straps on the side to make the shape of the entire backpack more stable, and the bottom is strengthened, and even applied cowhide leather for the base.
Strap and Case Hooks: used to hang water bottle, flashlight, umbrella, etc. If you are using earphones, you can also put the earphone cable through the hook to reduce swinging.
Strap Extension Lots: There are two extension lots of different sizes for hanging climbing hooks, etc.
Strap Elastic Mesh Sack: It can store small DAC/AMPs (the FiiO BTR7 Bluetooth amp is the maximum tested size, fits iFi GO Blu well.)
Optional Labels: the C2023 provides two stock labels in the package. You can pick the one you like and adhere it to the front of the case, or adhere other labels or brand stickers you prefer.
Main: The front and rear of the main storage space are padded with sponge, and there is a built-in zippered mesh pocket, open inner pocket, and burglarproof drawstring. The space may seem small, but it can handle more than you think.
Rear: The rear pocket can provide a larger space after unzipped (EG. 550mL water bottle.)
Front: The front zipper pocket can store keys, small change, credit cards, etc.