Great for warm-weather wear, the Buff CoolNet UV+ Multifunctional Headwear features HeiQ cooling technology and Polygiene odor control. The UPF 50+ sun protection helps shield harmful rays, and the garment can be worn 12 different ways, allowing a unique look to suit your needs. The Buff CoolNet UV+ Multifunctional Headwear features HeiQ cooling technology and UPF 50+ sun protection.