Specs:

• Constructed from 1200D polyester
• 3M reflective strip
• One main compartment with mesh inner pockets (large and medium models are expandable)
• Mounts to seat with two buckled seat straps and one velcro seatpost strap
• Velcro Straps
• 7.1x3.3x4.3 (SM)"
• 40 c.i.