This head pad is very convenient when you are on the go. Can be attached to many carrier straps such as ergo, colan, etc. Since it supports the back area, it can be used by people with a low age of 4 to 5 months. The shoulder part can also be used as a bib cover and is excellent for two birds with one stone. Aka-chan is sweaty. It is very convenient for anyone to have a change of washing. Baby boom carrier, all kinds of ergo, beko butterfly, manguka, belt fit collan, modal, shoulder, etc... We cannot guarantee it will fit on all types of leashes or baby straps, but if you ask your manufacturer and we can answer if you can wear it. Please contact us if you have any concerns.