“I have one fitted to my MTB. It’s an ultralight bag, tested over a 10hr ride, very functional and sits snug, no leg rub. Option to turn it around depending on frame - fits perfect to my hardtail MTB and reverse would do perfectly with my roadbike.
Has a strap inside to hold tools or whatever, waterproof, duel side zip, cable port both ends which you pierce depending on direction used.
Charged my light on the go. Unreal piece of kit I intend to use on a 1600km multi day route”