A baby's first mattress should be firmer than one designed for an older child or adult. Whether you choose a foam or innerspring model, a crib mattress should fit snugly in the crib's frame and meet Consumer Product Safety Commission standards. When your child graduates to a real bed, you can purchase a softer mattress, but it should have the same water-resistant features as a crib mattress.
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88 Coil Inner-Spring Crib and Toddler Mattress
Features: 88 coil inner-spring crib and toddler mattress Designed for comfort and support Provides a plush sleeping surface and two hypo-allergenic foam insulating layers...
$68.15 - $106.62Wayfair
150 Coil Inner - Spring Mattress and Toddler Mattress
Features: 150 coil inner-spring mattress and toddler mattress Designed for comfort and support Features a protective polyurethane foam wrap on each side Two hypo-allergen...
$92.67 - $137.27Wayfair
3" Organic Cotton Layer Mini Crib Mattress
Features: Organic Cotton Layer Mattress 3'' thick mattress with organic cotton layer Jacquard cover No phthalates No polyurethane foam Made in U.S.A
$39.45 - $56.00Wayfair