A very lightweight cap with a full, stiff peak offering excellent sun protection coupled with UPF 50+ fabric. Vents around the cap help keep your head cool and comfortable.
Buff says:
Protection is vital when running in the sun. Our line of running caps and visors has been specifically designed to provide protection and fresh looking style.
Buff's Pro Run Cap is an ideal hot weather running and trekking cap. You get a very good, stiff peak on this cap which is something that a brand might normally try and get rid of when trying to make a really lightweight cap. This cap remains lightweight due to the fabric used, it's incredibly light and silky, so it's going to dry very fast, easily wicking sweat & moisture away from your head.
A perfectly serviceable hat but really small. If you have to wear big helmets (60-63 cm or whevs) then look elsewhere. Doesn't seem to be a Buff thing, just this particular range thing as I have others that fit ok. Have it to my sis...