260 Heavy Duty 15.5 Gauge Steel Coils for Maximum Durability. 9 Gauge Border Rod for extra strength and support. Flex-edge clips for the ultimate in side edge support and safety. Cotton-poly coil wrap prevents loss of cushioning material. Organic Cotton Insulator pad for additional durability. Blended cotton layer for baby’s comfort. Deluxe Jacquard fabric with waterproof backing. Air-vents to promote a fresh mattress and cloth binding to prevent edge splitting. Our commitment to quality, affordability and durability is consistent in all of our mattresses. With L.A. Baby Naturals we add sustainability to that list. Firm support innerspring work together with luxurious cotton and a durable Jacquard outer cover to give your baby a comfortable sleeping environment and you peace of mind. The extra firm infant side provides support to your infant’s developing spine, while the firm side gives your toddler additional comfort for a good night’s sleep. Proudly made in the U.S.A.