What Our Gearhead(R) Experts Are Saying: "These are my go-to shorts for trail runs over 10 miles. The inner liner keeps everything in place and the phone pocket doesn't bounce. They dry quickly, feel light, and the waistband storage is super handy for gels or keys." We chase long miles and longer views, and the Mammut Aenergy TR 2 in 1 Short is built to match our stride. Designed for endurance runs and high-output training, these shorts combine a supportive inner tight with a breathable, quick-drying outer shell that's made for movement. The inner short wicks sweat, offers light compression, and securely holds a smartphone in a stretch pocket that won't bounce or chafe. Up top, the outer short flexes with every step thanks to 2-way stretch fabric and an adjustable waistband. With reflective details for low-light conditions, a zippered back pocket for keys, and quick-access waistband stash spots for nutrition, these shorts are trail-ready straight from the drawer.