STM Dux Backpack Large 30 Liter Volume for up to 17" Laptop, 16" Mac, Grey Storm Color, is the smarter rugged-comfortable-versatile-technology-fortress- your-friends-are-totally-going-to-envy backpack. Dux is here to protect your technology, your gear, your shoulders, and your distinctive style. The Dux Backpack was designed to give you unparalleled comfort, iconic style, versatile storage, and undeniable excellence all wrapped in a portable protective fortress suited to carry into any boardroom. Taking the concept of a backpack to an innovative level worthy of the Dux name (Australian slang for best in the class ), Dux Backpack presents an unrivaled carry experience.Device compatibility: fits most 17 laptops & 16? MacBook Pro. Color: Grey Storm. Smarter Features: FoamFortress 360 degree padding ensures rugged Mil-Spec cargo protection.Multi-direction cargo access through top and side pockets plus removable, positionable hook-and-loop, internal shelves provide infinite storage and organisational options. ComfortCarry ergonomic dual-foam shoulder straps plus molded EVA foam back panel with cooling airflow channels for maximum comfort. Sling Tech laptop section suspends devices up and away from the impact zone, with ample space for up to 17 laptops plus tablets and documents. Top-loading pocket for quick access with a convertible floor that zip-drops open to allow access to full depth of pack, plus cascading foldout pockets on front.Multiple pockets throughout, including side water bottle pockets, discrete security pocket, key clip, and cable keeper. PassPort luggage passthrough integrated into back panel lumbar pad provides secure placement on rolling luggage for convenient transport. EasyStash removable accessory pouch for quick access, on-the-go items. Water resistant shell deflects rain and spills to keep cargo dry and clean. Quick Spec and Tech: main material(s): grey- 330D Twill. outer dimensions: 20 x 13 x 9.5 in / 50.8 x 33 x 24.1 cm. weight: 3.92 lbs / 1.78 kg. capacity: 30.0 L (liters, volume)/ 1830.7 in.