Puma PE Brushed Long Sleeve Half Zip Running Top warmCELL Technology - Retains heat close to the body, keeping the wearer warm when the temperature drops. Mesh Inserts - Intelligently regulates temperature at critical heat zones, ensuring that an optimum temperature is constantly maintained. Reflective Detailing - Included throughout the garment to preserve a good degree of visibility in poor light. Half-Zip - Provides targeted ventilation when necessary.