Vivobarefoot winter boot - size EU 40L Shaft height: 10.75 Inches Description: Think winter trail pursuit, meets street-ready stomper! Upper - extreme warmth with a waxed organic canvas and deluxe leather upper (treated with a waterproof natural beeswax coating which helps to diminish water and snow away from the external body). Faux-fur around the top and “thinsulate” material inside to keep the warmth firmly contained within. Note, in my experience I am typically one size down in vivo’s compared to most other barefoot brands. But since this is a winter boot and is typically worn with thick socks, the sizing was perfect. This boot would be best for a medium to high volume foot, my low volume foot would cause the heel to rub unless I put a felt cloth in/on top of my foot.