The On Performance Winter Tights use a brushed, moisture-wicking recycled fabric for thermal performance on cold-weather runs without extra bulk. An adjustable drawstring waistband and fewer seams at the thigh keep the fit close and comfortable, with reflective details adding visibility on darker miles. What Our Gearhead(R) Experts Are Saying:"The thigh pocket holds my phone flat through a full run, even down a rough trail, so I stop checking on it by the second mile."