The Roly Poly is our medium size handlebar bag that is roughly 3L and overstuffable to about 5L. Features include: side stretch pockets that are covered by the roll top "lid", a zipper front pocket, front daisy chains and adjustable loops underneath as well as 2 small drop pockets inside to seperate out all the goodies.
This bag is perfect for a long day of gravel grinding to the multi-day bikepacking mission when paired with other bags.
Our Colorado Trail set up is a set of Mini Panniers, Small Frame Bag, 2 Stem Bags, and this Handlebar Bag.