Greg Lowe, founder of Lowepro, created the first internal-frame backpack in his garage in Colorado. This breakthrough design innovation helped packs fit close to the back and minimize load shifting – so gear-wearing adventurers can climb, bike, ski and scramble with more ease. They're using the same innovative mindset today. WHAT IT HOLDS The ProTactic 250 AW delivers a professional camera backpack that delivers mission-critical 4-way access for mirrorless cameras. Here's what it can hold. Mirrorless camera with lens attached (such as Olympus OM-D E-M1 with 12-40mm) 3-4 extra lenses or flashes Up to an 11 laptop (such as MacBook Air) Smartphone Small accessories and personal items Internal Dimensions: 26 x 11.1 x 41.5 cm (10.24 x 4.37 x 16.34 in) External Dimensions: 28 x 15.5 x 44.4 cm (11.02 x 6.10 x 17.48 in) Laptop Compartment: 25 x 4 x 33 cm (9.84 x 1.57 x 12.99 in) Weight: 1.8 kg (3.96 lbs) MAXFIT TECHNOLOGY LowePro's premium MaxFit organization system employs a laminated construction to fine-tune the fitting of dividers and make it easy to maximize the volume of gear. Get the maximum gear capacity to increase workflow and optimize organization. ACTIVZONE SYSTEM TECHNOLOGY Balance your system and your gear. Packs with this icon feature our ActivZone System technology. This harness delivers targeted support at shoulder blades, lumbar and waist for comfort on the move. SLIPLOCK TECHNOLOGY The SlipLock attachment system of compatible loops and tabs makes it easy to add pouches and cases to larger bags. This modular attachment systems allows you to be ready for anything and bring along water bottles, lenses, memory cards, etc.