perfect hat for glacier travel
I purchased this hat 2 years ago and have used while climbing Mt. Hood and Mt. Rainier. It works great for keeping the sun of your neck, ears and sides of your face. The hat is super light, breathes very well and drys quickly. I would recommend is hat to anyone after seeing my hat my father in-law and brother both purchased it.

Love it!
I used this hat yesterday for the first time on a 5 hours hike/run and it was just perfect. You might laugh at the reason why I purchased this hat... : to keep the bugs away from my face and specially my ears. It did the job AND it kept me cool on a very sunny day. I took some measurements and it was a little smaller than the S but it still fits perfectly. Love it!

good for long runs
When you're out running, it's a pain to remember to stop every 30 minutes to apply sunblock. This hat's great for folks who are of lighter complexion and worry about engaging in long, aerobic activities in the sun without applying protection. The hat has side meshes which can be covered or exposed, based on how you position the skirt. Overall, the skirt provides pretty decent protection from the sun. There is a draw string that helps you to adjust how much coverage you get from the skirt. In practice however, all it does is to prevent the skirt from flapping around while running. If you're standing still, you don't get any additional benefit by adjusting the drawstring. My only complain is that sometimes, I like to get into an incognito mode, where my entire face is covered. This will not do that. But overall, it's very functional and does a good job at warding off the sun block when you're running in the sun.

Sun Protection
This is the most comfortable cap I have worn. Excellent sun protection with the skirt. The skirt can be a little confusing until you have used it a few times. Once you become familiar with it you will love how versitle it can be. Good ventilation during hot days.

Excellent sun cap/hat
If you're looking for a super great, protective sun hat/cap, look no further than the Sun Runner Cap. It meets all of my needs as far as protecting my head, face and neck from high-altitude sun, and it looks cute, too! I'm female and have a smaller head and this hat comes in many sizes, which is great for the various head shapes out there. I bought a medium and it fits perfectly. The small fit, too, but I opted for a tad more room and went with the medium. I have this hat in both white and khaki, since I liked it so much, I bought two. It's extremely lightweight and comfortable. It's so versatile with the three different ways that it can be worn: ball cap, shade down half-way or full protection with the shade pulled all the way front. It's easy to remove the shade with the snaps and is very durable. On top of all this, it's super easy to wash. I just throw it in the washing machine, but then let it air dry so as to not distort the shape of the bill. I highly recommend this wonderful cap. It's the only one I've worn on numerous backpacking and hiking trips and is great for everyday casual use, too. You won't be disappointed.