Gregory’s Quatro Pro 22 has an ActiveShield compartment that keeps dirty or wet clothing and gear separated: The fully removable and cleanable compartment is made of recycled auto glass and uses an exclusive Polygiene anti-microbial technology to inhibit the growth of odor-causing bacteria. The spherical 4-wheel system provides smooth multi-directional rolling, and the premium polycarbonate shell has a matt finish and scratch-resistant texture to protect valuable contents.