1 - The material used is cotton jersey, devised to obtain the utmost control and stretch. 2 - The specific anatomical shape and the various bends of the insert which covers the buttocks, create a modelling and holding effect, as well as a push up effect. 3 - The shape of the crotch, used materials and type of sowing make sure that the trousers fit perfectly the inter-buttock groove and induce a push-up pressure. 4 - Customized silicone band, which improves the waistline fit, with a further shaping effect inserted inside the belt. 5 - Extra light silicone membrane, which creates a modelling and holding effect; it is inserted inside the trousers at hip/thigh level.