If you're looking for a large pack that securely holds everything, you've found it with the Mechanism Backpack.

• 30L capacity.
• Padded internal sleeve holds most 17" laptops.
• Accessories pockets on shoulder straps, top flap and sides with Velcro™ tab closures.
• Stuff sack style entry on top with drawstring closure and flap.
• Padded shoulder straps accented with parachute hardware.
• Removable waist strap.
• Media pocket.
• Water bottle pocket.
• Eyewear holder.
• Metal carrying handle.
• Custom Oakley D-rings and clip hardware.
• Embroidered, removable Oakley patch.
• Dimensions: 21"H x 17"W x 9"D.