"To use the carrier" means to utilize or make use of a transportation service or company to transport or deliver something from one place to another. Full definition
Memory foam has been added to the shoulder pads and the lumbar support that helps when using this carrier for an extended period of time. (babycarrierhq.com)
You should not use this carrier with a newborn because it covers too much of your child's body to be safe until he or she is a little older and bigger. (abckidsinc.com)
You can not use this carrier in a facing forward position, unlike many of the other more versatile carriers on the market. (abckidsinc.com)