Dual density non-woven batt

A dual layer, dual density batt, comprising:

• (a) a first batt layer between approximately seven and twelve inches thick and comprising at least first and second staple polymer fiber constituents forming a homogeneous intermixture of said fibers, at least some of said fibers in said first or second fiber constituents having a relatively low predetermined melting temperature and the remainder of said fiber in said first or second fiber constituents having a relatively high predetermined melting temperature;
• (b) a second batt layer between approximately three and six inches thick comprising at least first and second staple polymer fiber constituents forming a homogeneous intermixture of said fibers, at least some of said fibers in said first or second fiber constituents having a relatively low predetermined melting temperature and the remainder of said fiber in said first or second fiber constituents having a relatively high predetermined melting temperature, and said first and second fiber constituents of said first batt layer comprising a different proportion or selection of fibers from the second batt layer to produce a different density in said first and second batt layers upon compression;
• (c) said first and second fiber batt layers being 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, said first batt layer having a relatively high density and said second batt layer having a relatively low density;
• and
• (d) both first and second batt layers of the batt being resiliently compressible to at least one third of the uncompressed thickness.