Optimized for all Uppababy strollers and rumbleseats, the ultra-plush cozyganoosh footmuff provides ultimate coverage to keep your child toasty warm in inclement weather.New softer and cozier fleece lining grows with child using zip out extension and adjustable hood rumbleseat compatible with zipped in size increased hood coverage rolls over seat when not in use stays in place with grips to prevent sliding quick and easy attachment to the seat harness comfort rating of -5 degrees Fahrenheit/ -20 degrees Celsius compatible with all Uppababy strollers and rumbleseats