The Metolius Big Wall Gear Sling is essentially a technical daypack with massive gear loops for the shoulder straps. These gear loops have enough space for all the gear required for big walls, and there are daisy-style speed loops that separate the pitch's required gear from the gear you'll use on different pitches. Metolius made the main compartment out of Ballistic nylon for heavy-duty durability, and the main compartment is hydration-compatible. There's a small zippered pocket for accessories or snacks. It's easy to take the sling off and attach it to anchors when you're belaying. The shoulders and back panel are padded for comfort, and it's fully adjustable to fit most body sizes.
Double-sided gear sling with shoulder straps and back compartment
Main compartment is hydration-compatible and lined in fleece