In the N_Underwear application, it is possible to build a structure for a set of underwear (bra and panties) according to the improved English method. The application works in Ukrainian.The application is intended for use by teachers and students of higher education institutions (fields: "Technologies of light industry"; "Professional education. Technology of products of light industry"; "Clothing design"); representatives of sewing enterprises for individual production of clothes; students and teachers of colleges and technical schools; students of senior classes of secondary schools; "lovers" of sewing.When entering the mobile application, a screen with an image of the appearance of the products of the linen assortment opens to the user.To go to the next page with the original data, the user clicks on the image of the product. The starting data for the calculation are the dimensional characteristics of the figure and the addition to the main structural segments.After inputting the initial data, the calculation of structural sections is displayed on the screen in accordance with the sequence of construction of the structure.