Delsey Luggage Helium Superlite 29 Inch Expandable Lightweight 2 Wheel Rolling Upright Dura Tec Nylon The lightest weight luggage constructed with Dura-Tec material backed with vapor barrier for long lasting use Fully integrated lightweight memory frame Velocity wheels are recessed and protected provides a smooth and quiet rolling action Concealed Add-a-Bag strap with adjustable webbing allows additional bags to be carried effortlessly.