These are the "Inotani-san's Socks" - a version designed to be worn with shoes. The heel and toe utilize the design of Inotani-san's socks. The combination of sock yarn makes them thin yet durable. The toes are made with high-quality, superfine wool yarn, providing high moisture absorption and comfort. The heels are double-layered, making them durable and cushioned. Size: 23.5 - 25.5 cm Yarn Used: Sock yarn, as follows (marked with ㋞) Wool 75% / Polyamide 25% Opal, etc. Wool 100% (marked with ㋒) Puppy Construction: Heel → ㋞ x 2 Toe → ㋞ x 1 + ㋒ x 1 Body → ㋞ x 1 Machine washable in a laundry net. Do not use fabric softener or a dryer.