The Sealy Perfect Rest Infant/Toddler Crib Mattress has a high coil count 150 heavy-gauge steel innerspring coil system and secure edges. Reinforced cover with lock-stitched waterproof binding resists stains, odors and moisture. Firm hypoallergenic layers provide a hypoallergenic sleeping layer for comfort and support. Designed, engineered and proudly made in the USA of U.S. and globally sourced parts. Lifetime warranty on workmanship and materials. More babies sleep on a Sealy than any other crib mattress brand in the USA.