Designed for easy transport of larger loads. Expands vertically from 3-9 inches. Compression straps inside compartment help control heavier objects. Separate zippered lower compartment with foam for rattle-free storage. Holds flashlights tools camera etc. Measures 14in x 10in x 9in 1260 c.i. Full coverage storm flaps magnetic mounting with retaining strap narrow design. Lifetime manufacturers warranty.