knitting machine such as a tricot warp knit machine to yield a fabric with a fiber content of 80 nylon and 20 spandex having a minimum stretch characteristic of at least 80 this means that a measured length of unstretched fabric for example 5 inches must be stretchable to a length of at least 9 inches and must return to its original length when the pull force is released in order to consistently attain these stretch characteristics the nylon and spandex yarns are maintained at constant tension levels during knitting by the use of yarn tension devices outer body portion 24 has front and back portions 26 28 formed from less compressive and preferably decorative fabric it can be any warp knit solid fabric or any raschel type closed or open lace fabric outer body portion 24 can be sleeved sleeveless tank top or strapless front and back inner body portions 20 22 have vertical edges positioned in fig3 under the front and back outer body portions adjacent vertical edges 40 42 these seams are preferably sewn using a four needle flat seam which provides maximum stretch maximum comfort for the wearer and the least visibility of the seam when viewed from the outside during wearing since this seam is flat in construction it does not cut into the wear.