Smoothline is easily the most unobtrusive designs in the leg wear world this year a flat hold up top a satin smooth material and a non allergenic hold up band makes these hold ups the ideal item for those who want something unobtrusive and elegant these hold ups are almost like a second skin and fit better than most anything else we have but the best thing abotu them is the gel in the hold up tops is silicone free making them one of the only hypoallergenic hold ups ever made