MIPS: Multi-Directional Impact Protection System
There is also a 400mtr no fishing zone either side of these structures for this reason

Frame: Schwinn Twinn aluminum tandem Fork: Unknown (OMG the fork is so heavy) Rims: Mavic Crossmax with a braking surface Hubs: Mavic Crossmax disc 100/135 QR Tires: Vredestine Black Panther 26 x 2 tubeless with no sealant Handlebars: Doom Bars custom (the starting unbent tube was seven feet long) Headset: FSA Pig Crankset: Some old shits from a Jamis that I stole and wrote XTR on Pedals: RedShift Arclight pedals but with no lights Cassette: 18t Endless Bike cog Brakes: Stock Saddle: This chair-ass saddle I bought on eBay like five years ago Seatpost: KS Lev 27.2 shimmed with an Olipop can (front) / Stock (rear) Stem: Unbranded BMX stem with huge bolts Dropper lever: Paul Frame bags: Tiny fuckin framebag made from cardboard, white duct tape, and hot glue Accessory bags: Two Pit Viper sunglass holders drilled and mounted to water bottle mounts Other accessories: Knock-off Shimano crocs, hotdog holders + hot dogs, baguette, zip ties More accessories: Cable housing that was too short, blood, sweat, tears, etc

The liner is used to absorb most of the impact energy and reduce the wearers risks of sustaining head injuries
A proper travel tech backpack is the Swiss Army knife of bags-it needs to be smart, secure, and comfortable enough to wear through a three-hour airport layover