Regulite fabric Excellent thermal properties Soft fleece band liner Lightweight and breathable Reflective bobble and tab This Ronhill Bobble Hat will keep you warm on your winter run. Made with a structured 3D knit, this textured hat keeps in the warmth with its inner fleece band and lightweight Regulite fabric. The reflective bobble reflective tab detail both help you stay visible in poor light conditions. Weight: 62g