长发及腰哪有短发凉快
[zhăng fā jí yāo nă yŏu duăn fā liáng kuài]
The phrase '长发及腰' means hair that has grown long enough to reach one's waist. This net name is sarcastically comparing the comfort of having short hair over long hair in terms of keeping cool, essentially meaning 'long hair may look beautiful, but short hair feels cooler and more practical'.