100 Polyester FITS UPPAbaby STROLLERS: Ridge jogging Stroller ONLY COMPATIBLE WITH: UPPAbaby Aria infant car seat, Mesa infant car seat, Mesa V2 infant car seat, Mesa Max infant car seat (all model years) & UPPAbaby Bassinet (models 2015 - newer) TRANSFORM YOUR RIDGE: Create a from birth solution or a travel system on your Ridge stroller. Adapters allow for attachment of your UPPAbaby infant car seat or Bassinet. QUICK ATTACHMENT: A quick, no-tools attachment with color coded dot indicators ensures a proper and secure installation. FOLD-FRIENDLY: Stroller conveniently folds with the adapters on.