The Baby Jogger Car Seat Adaptor allows you to turn your single stroller into a travel system by providing a place to securely attach your Britax B-Safe car seat to the stroller until your baby can sit in the upright seat. Attaches to the stroller using the Universal Accessory Mounting Bracket. Legal Statements: This and all items from Baby Jogger are excluded from all promotions and discounts except where otherwise noted on product detail pages.