I've been looking for a slouch beanie that is big enough for my head for awhile. This fits great. I was lightly hesitant to purchase this one because it looked too warm for summer wear. Most everything out there topped off around 24 inches, was just a touch too small for me.
This beanie breathes well, which helps with it not being very hot. Definitely better for spring and fall, but I'm having no issues with it in 90 degree F weather.
I purchased all three colors, all of them are equally as great.