Most all infant car seats trap heat and moisture causing babies to overheat and sweat that can be hazardous to their health. The Comfy Breathable Car Seat Liner helps to solve this common year round problem. Summer - Air mesh wicks away moisture and promotes air circulation keeping your baby dry and cool during high temperatures. Winter - Keeping your baby dry in the winter is just as important. Air layers acts similar to duck down providing insulation and warmth. Superior and Lightweight Cushioning - 4 layer air mesh construction provides extra padding for baby comfort. Super light air mesh adds little weight. Spill Protection - Contains diaper accidents or vomit from ruining an expensive car seat. Wash the seat liner instead of the infant car seat or even worse the backseat of your automobile. Safety Tested - Crash tested so will not affect infant car seat safety protection. Flammability tested. Polyester is hypo-allergenic. CPSIA compliant.