This product is created with a seamless knit construction that helps prevent chafing so you can keep comfortable and focused. This top features ACTIBREEZE technology with the strategic body-mapped knit aeration zones that provide targeted ventilation, advanced breathability, and comfort. It's complemented with thumbholes at the sleeves for convenience for your daily runs. At least 50% of the garment's main material is made with recycled polyester to reduce waste and carbon emissions.