100% organic cotton, inside and out, our crib mattress pad sets the perfect foundation on top of the mattress and under a crib fitted sheet. Finished with two-inch quilted squares and a 220 percale covering. Free of chemical finishes and flame retardants, GOTS certified. Tip from the experts: Never underestimate the value of a good mattress pad. It will extend the life of your mattress dramatically by helping to fend off spills, stains, sweat and skin oils. We recommend washing your mattress pad monthly.