ActiveShield compartment keeps dirty or wet clothing and gear separated for vapor, odor and dirt protection Fully removable and cleanable compartment, built from recycled auto glass, with exclusive Polygiene technology to help maintain freshness Proprietary Quadro spherical 4-wheel system provides smooth multi-directional rolling Premium polycarbonate shell with a matte finish and textured surface, designed to help resist scratches, protecting valuable contents. 1.5"/ 38mm expandable volume Integrated TSA approved zipper combination lock QUADRO PRO 22 CARRY ON