This spiral beanie style hat is made from a soft 100% acrylic yarn. It is thick enough to be worn on all but the coldest days. This hat will fit a 22 to 24 inch head. Although I recommend hand washing all knit and crochet items,this can be put in the washer on a gentle cycle in cold water. Please lay flat to dry. All of my items are made in a smoke free home. I do have a guinea pig, but she doesn't crawl all over my yarn! If you are out of the US, please contact me for a shipping quote.