Features include: Multi-Mounting options from racks to seats. Utilizing Hooks under the seat lip or adjustable straps under the seat. Bunji cord top for more stuff. Expandable "Wedge Gusset" Interior Zippered Mesh pocket 2 Interior Adjustable Compression Straps-Keeps the load very stable. Large and Durable #10 Ykk zippered main opening. Plastic and Foam Stiffened, Foam Bottom Tough-Tek non-skid/non-scratch outside bottom Reflective Accents on sides. Dimensions: Length: 10" Width: Front- 9 1/2" Rear-5" Height: 6 1/4" Expanded 10 1/4" (at rear)