Is the Buff CoolNet UV+ worth it?

At $7.49 at eBay as of November 4, 2026, it is a cheap way to get UPF 50+ coverage and cooling fabric. Buyers who want warmth or a structured fit should look elsewhere.

How does it compare to the original Buff?

The CoolNet UV+ adds HeiQ cooling and UPF 50+ to the classic microfiber tube and uses 95% recycled material. It is lighter and cooler than the standard Buff, but thinner in cold weather.

Does it really keep you cool?

The HeiQ fabric feels cool when damp and wicks sweat, which helps in heat. It does not lower body temperature on its own; wet it for the strongest effect.

What size head does it fit?

It is one size for most adults, roughly 53 cm long and 22 cm wide as a flat tube. It stretches to fit most heads but runs snug on very large heads and loose on small ones.

Can I wear it under a helmet?

Yes. At about 35 grams it fits under bike and climbing helmets as a cap or headband without adding bulk. It is thin enough that it will not cushion impacts.

Prices vary by store and colorway; the $7.49 eBay listing as of November 4, 2026 is the lowest of the six stores tracked. Limited-edition prints usually cost more than solid colors.