New Balance Men's Apparel Size Chart From sunshine, to foliage to winter frost, this running wardrobe mainstay is made with new lighter weight, exceptionally soft fabric that delivers the perfect unity of warmth and breathability so you can enjoy the scenery any time of year. It has an athletic fit cut from soft, stretchy NB Dry fabric that wicks moisture away when your run heats up. Hidden thumbholes help keep the sleeves in place, while reflective hits at the hem offer a bit of day-and-night shine. For sunny springtime runs when days start getting longer, the Seasonless Long Sleeve also offers UPF 40 sun protection. Features: - Athletic fit - Baby merrow stitch construction - Reflective overlays at the hem notch - UPF 40+ - 92% Polyester and 8% Spandex