Brenthaven Metrolite X-ray Friendly Backpack for Up to 15.4" Laptops X-Ray Friendly design butterflies open for ease of passage at airport security High Density Foam protection system keeps your laptop safe and secure Back slip pocket can unzip and be used as wheelie strap Front organizer panel has multiple pockets for accessories and dedicated AC Adapter pocket Combination compartment file organizer and multi-media storage section