Add necessary support and luxurious comfort to infant car seats, jogger, strollers, bouncer seats, convertible car seats, bike trailers, backpacks, baby swings, etc.!! adjust upward-Separate head support s as baby grows for a custom fit. Can be used alone. -Soft body support cushions provide ideal support for proper posture to keep baby stable and comfortable. -Fits all harness systems....no need to thread straps when transferring the Snuzzler to a different seat! -Crash Tested for safety...no padding behind baby to ensure a safe harness fit. -Reversible for two looks...easily reverses from plus ivory velboa to smooth cotton!