As it is made soft, 'kohimo' (a thin strap) is put around a thumb and the strap is tightened to assist the movement of a boshi in "Kyudo-shaho hassetsu."
柔らかく作られている為、“弓道射法八節”に於ける帽子の働きを助ける為に「小紐」を一回り親指に絡めてカケ紐を締める。