The baby seat mat provides the ideal support for baby's back and head, adjusting upward as baby grows. The unique contours work well with all harness systems and the seat cover transfers easily to provide support for baby in car seats, strollers, jogging strollers and swings. With padding only on the sides, not behind baby, the seat mat does not interfere with the safety of car seat harnesses. Dimensions:80*50cm/31.5*19.7 inch. Provides ideal support for babies seated in car seats, strollers, bouncer seats and infant swings Separate head support adjusts upward as baby grows for a custom fit. Perfect fit for all babies and preemies,fit for car seats, joggers, strollers providing safe on the go comfort and support. Machine washable.