Grace Mattress - Sleep In MattressSleep In Mattress Grace Introducing the Grace by Sleep In Mattress. The Grace is a firm euro top mattress that provides a unique comfort, as the initial feel is a super soft quilting however with very firm high density foam euro top reveals its true firmness. 972 tri zone pocket coils 13 1 2 gauge Breathable bamboo fabric 1" visco memory with 20 oz poly quilted 2" firm soya based foam. Double fibre pad with lumbar support. High density 360 edge