Whether you need to carry extra supplies for that extra long ride or you just like to be prepared, the BikeSmart SaddlePack 2.0 Medium Seat Bag will give you the under-seat storage space you need. Easily fits all the flat changing essentials with plenty of room to spare for extra supplies, wallet, cell phone and more. Also features an expandable compartment for extra storage only when you need it. Durable construction features reflective piping for increased visibility and a sturdy rear taillight strap. Mesh side panels conveniently hold energy gels or other small items.