Heys xcase collection is made from a Polycarbonate composite, Polycarbonate is the same material used in the making of Bullet-proof glass. It is both durable and flexible so that it can absorb impacts and then flex-back to its original shape and makes this set the world's lightest luggage. The xcase-XL® has the curved handle system, that will prevent the annoying 'back-kicking' of the case. The xcaseXL was featured on CBS, CTV and throughout the CBS hit show "How I Met Your Mother" which aired on Feb 12th, 2007.