The Rab Khroma Kinetic Bibs are made for superior comfort and performance on your biggest expeditions. The Proflex fabric has a stretchy, softshell feel that makes kickturns a breeze with the bomber 20,000mm / 25,000g waterproof-breathability of a hardshell. Thigh vents let you dump heat quickly and a dropseat makes bathroom breaks a little easier on multiday missions.