Mattress, Gray, Material: Foam
Amazon
Newton Baby Crib Mattress and Toddler Bed - 100% Breathable Proven to Reduce Suffocation Risk, 100% Washable, Non-Toxic, Better Than Organic - Removable Cover -Deluxe 5.5" Thick - Grey
Babylist
Newton Baby Breathable 2-Stage Crib Mattress in Grey | 100% Recyclable