The hat fits on my head, but my head circumference is 23", at the high end of the recommended size range for M. The elastic makes it a little tight on my head. Otherwise, the hat performs very well - blocks the brightness between the top of my shades and the rim of the helmet, controls sweat to a reasonable degree, and most importantly it shades my bald head from the sun! I wish white L was available.

Great fit, very light weight fabric, nice small brim, good fit under helmet. Some sweat management.

Light, has a sweatband and dries out quickly

Great cap. Fits very well and the bill is not too long, so it doesn’t cause neck strain while descending. Bravo

Great light weight fabric, quick drying, small size fit my head perfect, plenty of colors, I will buy again, especially on sale.

Great little head shade that provides protection ans doesn't block forward a d side visible. You forget it is on.

Amazing little hat, wicks away sweat and it’s non-intrusive with the helmet! It’s perfect for people like me who have helmet hair issues haha. Someone said M fits most but I actually had to go a size up. For reference I have an average head shape and wear between M & L in Motorcycle helmets for those of you that ride motorcycles. M fits but L in this hat fits better with my cycling helmet. I have one in every color.

Fit is good. Nice hat

Fit is perfect and fabric is exact weight I wanted for riding in 45-60 degree Fahrenheit temps.

Great cap. Lightweight and versatile. I’ve worn it on rides ranging in temps and it’s been great on all of them. Shields the sun and also helps block the rain. Highly recommended!

Hat fits great and absorbs sweat well. If there was one issue it would be a wish for more breathablity. Other than that, very happy with it.

I like specialized’s caps the short brims work great under a helmet when biking.

I was using a Buff for sweat management, but I needed a visor to shield the sun from my eyes. This cap serves both purposes, and is very comfortable. A medium size fits perfectly and will for most people.

I have tried a few different cycling caps and their visors would flap about from the wind impact. Not this cap. The visor is sturdy, non-intrusive and blocks the sun from my eyes. I love that it is light weight, breathable and has UV protection to protect my hair from sun damage. I will be buying a couple more for spares.

Looks a little goofy

Best cap I've found. I don't leave home without a cap under my helmet to protect from the sun. A lot of caps fit goofy, or have a flimsy bill that flops down in front of my eyes when i pick up speed. This hat is the best.

Soft, easy to wear, does what it claims to do.

Excellent fit, nice light fabric seems to have moisture wicking qualities & a functional visor to help deal with strong sunlight

If you have hair, the fabric is slippery and kinds pulls off. BUT it stays in place under a helmet and protects you from the sun. Most people would probably fit a Medium.