From their FAQ:
"Harness covers are provided with some Evenflo car seats. For models not sold with harness covers, they are available for purchase from ParentLink for the following models:
Maestro combination car seat
SecureKid combination car seat
SureRide/Titan 65 convertible car seat
Only those harness covers provided by Evenflo should be used with these seats. Please contact ParentLink at 1-800-233-5921 (U.S.) or 1-937-773-3971 (Canada), Monday - Friday, 8 am - 5 pm (EST) to inquire about harness covers."
"Harness covers are provided with some Evenflo car seats. For models not sold with harness covers, they are available for purchase from ParentLink for the following models:
Maestro combination car seat
SecureKid combination car seat
SureRide/Titan 65 convertible car seat
Only those harness covers provided by Evenflo should be used with these seats. Please contact ParentLink at 1-800-233-5921 (U.S.) or 1-937-773-3971 (Canada), Monday - Friday, 8 am - 5 pm (EST) to inquire about harness covers."