Great bag that straps firmly to my luggage rack. I like being able to carry a tool roll and flat tire kit with a compressor along with a bottle of water and camera. Also has side and top pockets for smaller items like glasses, bike documents, Covid masks, phone charger, etc. The straps are sturdy and only takes about 20-30 seconds to affix to the bike. It came with a shoulder strap, but I doubt I will ever use it. I have tested this in heavy rain and it IS waterproof.