They are not for making the shoes look good nor are they for coolness. Because if they were for coolness why then do most of the monks and nuns wear thick socks and what's more how can they keep their feet warm in the winter?
因為，假如是為了涼爽，大部分的出家人穿鞋，裡面都穿了厚的布襪，何況一到了冬天就難以保障了。