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 QuickClick8.3x4.9x5.5` (LG)90-120 c.i.BlackMedium (101-200 c.i.)UPC/EAN/GTIN: 768661113889