a dual layer , dual density batt having a first batt layer comprising at least first and second staple polymer fiber constituents forming a homogeneous intermixture of the fibers , at least some of the fibers in the first or second fiber constituents having a relatively low predetermined melting temperature and the remainder of the fiber in the first or second fiber constituents having a relatively high predetermined melting temperature and a second batt layer comprising at least first and second staple polymer fiber constituents forming a homogeneous intermixture of the fibers . at least some of the fibers in the first or second fiber constituents have a relatively low predetermined melting temperature and the remainder of the fiber in the first or second fiber constituents have a relatively high predetermined melting temperature . the first and second fiber constituents of the first batt layer comprise a different proportion or selection of fibers from the second batt layer to produce a different density in the first and second batt layers upon compression . the first and second fiber batt layers are overlaid to define a multi - layer web structure having intimately interconnected and fused first and second batt layers and intimately interconnected and fused first and second fiber constituents in both first and second batt layers . the first batt layer has a relatively high density and the second batt layer has a relatively low density . both first and second batt layers of the batt are resiliently compressible to at least one - third of the uncompressed thickness .