Kids' Felt Boots (7). Detskie Valenki - new. These felt boots (valenki) from Kotofey is known for their lightness. special insoles. all natural hygienic and eco-friendly materials. and an excellent shock-absorbent sole. The tops of the boots are cut to hold legs in the proper position. protecting kids from injury or accidents while walking. Made by Kotofey in Russia. Material 100% sheep's wool. Size: USA 7 (Russian 23)