The ASICS Metarun Mock Long Sleeve makes running a breeze. Cut from breathable, thermoregulating and ultra-soft fabric, this slim-fit long sleeve is the perfect base layer for your workouts in cool and cold weather. It has thumbholes for extra coverage and easy layering, while a high-neck design helps keep wind and cold air from sneaking in. Details: Premium fabric with Lyocell is soft on your skin and thermoregulating ACTIBREEZE™ technology for increased breathability PRO-FIT TECHNOLOGY™ for improved freedom of movement Advanced reflective details are designed to help support 360-degree visibility in low-light conditions Thumbholes for a no-ride-up sleeve High-neck design helps to shield from wind