On Running Zero 2-In-1 Shorts combine a perforated outer layer with an integrated compression liner for breathable, secure running performance. Key attributes: Black | Polyester | Moisture-wicking | Breathable | Lightweight | Stretch | Elasticated waistband | Drawstring fastening | Inner compression shorts | Phone pocket at side seam | Perforated outer layer | Two-layer construction | Printed logo at front leg | Dimensions & fit: True to size | Regular-straight leg | Mid-rise | Adjustable drawstring waist | Composition & care: 83% Polyester, 17% Elastane | Machine wash at 30°C.