80% Sponge, 20% Polyster Innovative Design: Our car seat cushion is specifically designed to provide your little one with the best in comfort and support. The ergonomic design distributes pressure evenly, while the padded edges create a cozy nest for your baby to rest in. High-Quality Materials: Made of ultra-soft and breathable fabric, this infant cushion ensures perfect head, back, and neck ventilation. Your baby will feel safe and happy. Universal Fit: Compatible with most baby rockers, swings, strollers, high chairs, and baby seats, this baby cushion is an essential accessory for your baby's comfort. It's also adaptable to 2, 3, and 5-point harness systems for safety and convenience. Adjustable Height: As your baby grows, so does our cushion! The height can easily be adjusted up to 7cm; the total height of the car seat insert liner can range from 57-64 cm. Detachable Headrest: This baby liner comes with a detachable headrest that can be removed to fit any car seat with thick or narrow headrests. Easy to Clean and Maintain: The newborn cushion is both hand and machine washable, ensuring a fast and easy clean-up. Plus, it dries quickly, so you always have a clean and fresh cushion for your baby. Ihaapsi Baby Support Cushion - Breathable 3D Mesh Infant Insert for Strollers, Car Seats, High Chairs, and More - Perfect for Newborns