A fender bag and mounting system that is easy to install and supports the majority of users' carrying needs-such as a change of shoes and shirt, a book, wallet, snack, towel, and other small items.
Paracord drawstrings secure cargo, and heavy duty aluminum clips hold everything tightly. 
A rigid stainless-steel tube frame ensures solid structure for transportation.
A rear tube handle is used to remove the bag from the frame, and is able to mount a standard seatpost tail light.
The bag removed and ready to carry.
Process
The basis of this design was a result of 120 responses sourced from an online cycling community. The majority of respondents most frequently traveled to work or school in urban environments, and carried small items such as tools, clothes, or snack using backpacks.
Seatpost-mounted bags appeared to offer the most benefits for most users who did not need large capacity, but were not widely used or well-known, and seemed to be notorious for floppy structures. This seemed like a strong opportunity to improve upon.
Thanks for looking!

other work