Huf Puf kit is a ready to use inhaler extension kit, which includes baby mask and zerostat vt spacer. The huf puf kit is especially designed to deliver medicine to children up to 4 years of age using an inhaler. It is an easy-to-use kit that makes it convenient for a child to obtain the full benefits of the medicine while breathing in and out normally. The shape of the mask provides a comfortable fit over a child's face for breathing, and transparent spacer allows you to keep a check on the dose released in the spacer.