RAB says about the Aeon LT 5
Lightweight, low profile, and stable belt pack ideal for fast paced mountain days, built with the ventilated Air Contour™ lumbar pad. Keep your upper body free, stash all the essentials and press on with the ascent. Lightweight and breathable Air Contour™ lumbar pad. Pre-curved shape for enhanced fit and comfort. Inset single sided buckle adjustment with comfortable padded protection. Dual zipped compartments for organised storage. External mesh stash pockets for quick access to items. 4 small webbing tabs allow you to add additional storage options. Light loop. Features an internal security pocket