Ideal for multi-day trips or adventures with heavy gear. It works best when combined with the Pro-Large camera bag insert and the Pro-XL camera bag insert. A complete table of recommended and compatible inserts is available. The DuraDiamond material is a proprietary development by f-stop, making it stronger, lighter, and more weather-resistant. BLOOM foam (made from algae) in the shoulder straps and hip belt provides all-day comfort. A combination of T6 aluminum and plastic offers greater stability in key carrying and suspension components. Enhanced weatherproof zippers, including interwoven zippers. Improved organization and storage features in pockets, lids, and the back panel. The aluminum frame shifts the weight of the backpack to the hips, ensuring all-day carrying comfort.