Abstract: The invention concerns a size-determining system and method of size grading type, used in particular to determine sizes, and a method to produce the system for a product to be worn on parts of the body. The method to produce the system includes selecting principal morphological parameters from among parameters corresponding to the distance between two morphological markers characteristic of the body part and selecting product parameters, determining an arithmetical relationship between each product parameter and the principal morphological parameters, and determining sizes defined by particular variation intervals of the principle morphological parameters or product parameters. The system stores values of the morphological parameters and product parameters and includes a module to calculate the value of the product parameters in relation to the value of the principal morphological parameters.

Abstract: Tights having a localized compression effect for practicing a sport in which the legs are moved repetitively, in particular running or cycling, are constituted by stretchable textile pieces assembled to one another, namely first pieces having normal elasticity, second pieces providing a compression effect, and optionally third pieces having greater elasticity. When assembled together, all of the first and second pieces present substantially the same mean elasticity in the longitudinal direction of the tights, while the second pieces present, in the transverse direction, mean elasticity that is less than half the mean elasticity of the first pieces. Preferably, the difference in mean elasticity in the transverse direction between the first pieces and second pieces presenting the compression effect presents a ratio lying in the range 2 to 3.

Abstract: A garment with localized compression effect for performing a sport, the garment being obtained by assembling first pieces of basic elasticity and second pieces that present a compression effect. The garment includes a plurality of types of second piece suitable for producing different compression effects, each type acting in a determined compression range; each second piece is arranged so as to produce a compression effect that is either longitudinal or transverse; and the second pieces of the various types are arranged in the assembly so as to surround certain transverse sections of at least one limb and/or the torso in full or in part and so as to exert a non-uniform compression effect with a pressure gradient that decreases towards the heart. In a variant, the second pieces are selected from three types, having compression ranges that correspond to compression effects that are respectively weak, medium, and strong.

Abstract: The invention concerns a size-determining system and method of size grading type, used in particular to determine sizes, and a method to produce said system for a product to be worn on parts of the body, notably in the area of items for sub-aquatic vision. The method to produce the system comprises selecting principal morphological parameters from among parameters corresponding to the distance between two morphological markers characteristic of the body part. It also comprises selecting product parameters corresponding to the distance between two geometrically characteristic points of the product, determining an arithmetical relationship between each product parameter and the principal morphological parameters, and determining sizes defined by particular variation intervals of the principal morphological parameters or product parameters.

Abstract: Tights having a localized compression effect for practicing a sport in which the legs are moved repetitively, in particular running or cycling, are constituted by stretchable textile pieces assembled to one another, namely first pieces having normal elasticity, second pieces providing a compression effect, and optionally third pieces having greater elasticity. When assembled together, all of the first and second pieces present substantially the same mean elasticity in the longitudinal direction of the tights, while the second pieces present, in the transverse direction, mean elasticity that is less than half the mean elasticity of the first pieces. Preferably, the difference in mean elasticity in the transverse direction between the first pieces and second pieces presenting the compression effect presents a ratio lying in the range 2 to 3.