Main functions: when the baby's head is collided, it can play the role of shock absorption and buffer to avoid or reduce the injury to its head.

Main features:

(1) the inner bladder is a black environment, breathable and sweaty mesh sponge, which has the advantages of shock absorption, shock resistance, air permeability, light flexibility and so on.

(2) external use of environmental suede: it has the characteristics of comfort, sweating, antistatic and so on.

(4) the overall weight of the hat is light, and the size of the hat is adjustable for a long time.