Trailberg Rapid Keyline Pants in Black. The perfect addition to your outdoor pursuits collection, the Rapid Keyline is your new go-to for running and walking. Add some style to your lifestyle with a ruched elasticated waistband complete with internal drawstrings for an optimal fit, 3 secure zip fastening pockets for the safe storage of your small belongings, zipped side openings to ankle and reflective logos and side seam strip to make sure you stay safely visible on those low light outdoor sessions. Made from a comfortable 4-ways stretch fabric for unrestricted wear.