Constructed from 1000D nylon3M reflective stripOne main compartment with inner mesh pockets (large and medium models are expandable)QuickClick (F25) seat mounting system with velcro seatpost strap QuickClick6.3x3.1x2.9` (XS)25 c.i.BlackSmall (1-100 c.i.)UPC/EAN/GTIN: 768661116521