The Alto Wool hi-top sneaker is made from super soft ethically sourced merino wool with accents of pineapple husk leather. Why super fine merino wool? YY Nation wool is so fine it molds to your foot while maintaining great strength using patented spinning technology. And this YY wool has so many benefits. It keeps your foot temperature regulated, eliminates odor, and it’s machine washable so it’s easy to keep clean.