Constructed from 1200D polyester3M reflective stripOne main compartment with mesh inner pockets (large and medium models are expandable)Mounts to seat with two buckled seat straps and one velcro seatpost strapVelcro Straps9.1x5.1x5.5 (LG)`90-120 c.i.BlackMedium (101-200 c.i.)UPC/EAN/GTIN: 768661114480