New Balance Women's Apparel Size Chart Confidently give length to your running season with the NB Heat Tight. This update features NB Heat technology to help you stay warm when temperatures drop. The wide, mid-rise waistband gives comfortable security to its fitted silhouette. Plus, a zip side pocket safely stores keys and cash, while the drop-in pocket stores electronics and other essentials. NB Heat fleece captures heat while wicking sweat away for dry, lightweight warmth. Features: - NB Heat technology captures warmth while wicking away moisture - Wide mid-rise waistband - Fitted - Zip side and drop-in pockets - 84% Polyester and 16% Black Spandex