For going long distance, the Cedaero Tank Top LD has 37% more volume than the regular Tank Top pack. Think of this as a go-to pack for all the items you need to quickly access like cell phone, food, keys, basic tools, etc... plus a little more. The Tank Top LD has a moveable Velcro OneWrap cinch on the stem to keep it from flopping like a fish. The burly water resistant #9 coil zipper enables easy single-handed opening without sticking. Internal foam padding provides some cushion and gives structure to the pack. The interior is equipped with a flat mesh pocket and a key hook. The Tank Top LD fits most bikes, however its increased length does take up more room on the top tube, so you'll want to measure things if you ride a very small frame.