The Blanket 212 Evolution keeps little ones toasty from head to toe on mountain hikes, chilly city streets, and everywhere in between. The smart design allows you to size it up or down using zippered length and width extensions—so it can actually grow with your child for up to 4 years! Other notable features include simple hook & loop attachments that fit any stroller, plus a removable anti-slip back panel that eliminates extra fabric between baby’s back and the harness. This helps both the harness stay put and gives you easy access to it anytime you need it.