Amenity Mattress | Mid-Range Comfort by Sleep InAmenity Mattress by Sleep In Brad here from Mattress Miracle. The Amenity sits right in the sweet spot of Sleep In's lineup. Not too firm, not too soft, and built with the kind of materials that hold up year after year. In our experience, this is the mattress that satisfies the widest range of sleepers. Sleep In designed the Amenity as a versatile comfort mattress that works for every sleep position. The balanced construction provides enough support