Aircee (TM) 35L Military Hiking Assault Pack Travel Bug Out Bag School Backpack nylon Advantage of Fencher internal frame backpack: Built-in with durable aluminum internal frame, create the gap between your back and your backpack to allows air in and out, without get your back sweaty even in the hottest summer. Also the internal frame will help to redistribute the weight and minimize the pressure pressed on your spine, by transferring much of the weight to the hips and legs, Makes you feel more comfortable and lighter on the journey. Capacity up to 85 Liters, Main compartment holds up to 17.3 standard laptop, weight: 4 lb 7oz, dimension: 30.5" x15.7" x8.7", fit well with people between 5'4" to 6'5". 1 inch thick strap and padding on the shoulder and back helped to redistribute the weight over a wider surface area, helping to alleviate the burden and provide a more comfortable experience when wearing the backpack . Made of reinforced waterproof(water resistant) nylon and polyester Oxford fabric, come with water-proof rain cover.