Brooks Run Visible Insulated Vest 2.0 - Women'sExtra warmth for cool, dark runs. Low temps and low lights? Run in this insulated women's vest. GO Warm fabric and 120g Thermolite insulation traps heat to keep you comfortable, while high visibility design helps you stay seen in low light conditions. Features Semi Fitted Best for: Visibility, Layering, Warmth, Storage Visible in the dark: Fluorescence, high contrast, and reflectivity in critical motion zones help runners be seen in the dark Insulated