We also offer our three-part base mattresses (= padded slatted frame) UF-RH 3/3, in conjunction with the Biocen O-RS mattress, to match or complement it. Here the untreated spring slats made of beech are covered with horsehair and then inserted as a whole into the cotton cover. The base mattress Biocen UM-RS 3/3 is made in the same way as the UF-RH, but is padded on top of a thin mattress (which is then connected to each other in the fabric). In conjunction with the topper Biocen MA-RS, the result is a slightly more cozy lying feeling than the firmer version UF-RH with Biocen O-RS. The base mattress is, as the name suggests, a base mattress and also has a three-part design and is the optimal complement to our solid horse hair mattress or topper Biocen MA-RS.