Abstract: A knitted quilt fabric is made of a first layer of a first knit material and a second layer of a second knit material, with a filler material composed of a plurality of plaited lay-in fibers between the two layers. The first layer and second layer are joined at a plurality of locations with knits forming at least one linear quilt line. Each knit of the linear quilt line is formed around a plaited lay-in fiber by knitting a first fiber of the first material to the second material and returning to the first material and knitting a second fiber of the second material to the first material and returning to the second material. Each lay-in fiber is an elastic polyether-polyurea copolymer which is plaited with one or more natural or synthetic yarns.