The Montana Ruff is made from soft, thick woven cotton. Super cozy in chilly weather, and crazy fashionable as well! Our Ruffs are made based on the Mobius design - infinity with a twist! Just pop the Ruff over your pup's head and you are set! Please see our SIZE CHART for breed recommendations. Add a few inches to your dog's neck measurement if he or she is extra fluffy. ***SBDC FAVE***