The inner material of a tailored garment that gives it shape or body. There are two methods of attaching interlining in suits and sport coats. The first is fusing, which means bonding the fabric and canvas at the seams using glue, heat and pressure. Fusing adds body but inhibits the interlining from moving freely, resulting in a stiffer drape. The second construction method is when the canvas is sewn in at the seams, either by hand or by machine. This allows the interlining to move freely, resulting in a more supple, better-fitting garment. The most expensive and desirable is a hand-stitched interlining. Some garments can have partially fused and machine-stitched canvas construction.