This is a summer hat. I bought it because I thought the light blue, purple, and orange colors were cute, but I kept it stored away without using it. I don't know the material, but it's knitted. The brim is made of purple knit material and has wire in it. There's something like a pom-pom attached, but it's squashed, so you could remove it or attach your favorite badge instead. There's no size indicated, but I think most people could wear it... (^-^; I think it would also be cute for elementary school students in the middle to upper grades to wear. May change from YuYu to RakuRaku shipping.