Most sleeves found in the market today are made from neoprene. Though neoprene may feel good and spongy to your hands, it actually provides very little in the way of shock protection. The Flak Jacket combines low resilience, highly shock absorbing foam with corrugated plastic stiffeners to provide complete protection for your laptop in a slim, lightweight solution. Not only is the low resilience foam more environmentally friendly than neoprene, but in the event of a fall, it's friendlier to your computer as well. Don't let your laptop or tablet leave the house without its jacket.