Built to airline size and weight requirements Waterproof bottom compartment for wet or dirty items Breathable top compartment for damp gear to air out Heavy-duty rail along the bottom and reinforcements with abrasion-resistant material on corners for travel toughness Low-Profile frame system reduces height for easy storage Replaceable frame components and wheels Multi-purpose changing pad with anti-slip bottom Quick-Access front zippered pockets Sturdy, comfort grab handles for easy lifting and maneuvering Add-a-Bag strap to easily attach secondary bags to roller Bright interior lining to find small items easily Water-resistant zippers with sturdy pulls for protection from the elements Ergonomic compression straps on the outside for space saving cinching Combination of 630D / 420D HD fabric with DWR finish for high water resistance Combination of Hypalon and Tarpaulin for reinforcement and abrasion resistance on stress points Tough design perfect for scuba diving boats and gear