Planet Bike Big Buddy bike bag 80 cu. in. volume will hold your repair kit, a spare tube, cell phone, snacks and more. Low profile design secures snuggly and easily under your saddle The beefy zipper holds up to years of wear and tear White liner makes finding items easy Internal padded interior protects cargo Bag is low profile, secure, and easy to install White liner so you can see your stuff Padded interior for protection Reflective piping and light strap on back 80 cu. in.