CoolNet© UV+ Headband. Our new BUFF© headband has taken a step further and continues to be made from recycled, fused fabrics. It remains comfortable and breathable, but now adapts even better to your head thanks to its new tapered design. No matter what activity you want to engage in under the sun, you will stay cool and protected. The CoolNet© UV+ technology wicks away sweat and prevents skin irritation, while also protecting against harmful UV rays. Comfort and protection in one. 91% recycled polyester, 5% elastane, 4% silicone.