New Balance Impact Run Grid Crew Women's Enjoy lightweight, breathable warmth in the New Balance Heatgrid Crew. Made of grid-back fleece, this shirt features NB Heat, which helps you retain body heat while also wicking moisture to keep you warm, dry, and comfortable. Features Athletic fit. NB logo at left chest. Thumbholes to keep sleeves in place. Sizing Small: 32-35" chest Medium: 35-37" chest Large: 37-40" chest X-Large: 40-44" chest *Measurements refer to body size, not garment size.