The Lowepro Pro Trekker 400 AW Backpack (Mica and Black) is a lightweight, rugged, hydration-ready, expedition camera backpack designed to carry 1-2 pro digital SLR camera bodies with grip and lens attached (up to 400mm f/2.8), 4-6 additional lenses, 2 lash units, a tripod or monopod, accessories and personal gear and a widescreen laptop computer up to a 15.4". The pack is made from AZ Dobby ballistic nylon polyurethane exterior with Hypalon trim, a Velex brushed nylon and polyurethane lining and HDPE .