A kind of seamless athletic undergarment of what is closed in this creation system,The athletic undergarment has ectonexine structure,Outer layer is elastical cloth,The horizontal surface of second order in the left and right of the elastical cloth be it is seamless,Internal layer is enclosed on the elastical cloth what combines two cups and on-slip cloth,Sewing has an elastic connection cloth between two cups,Periphery sewing is enclosed under the elastical cloth what a circle width pencil of planes chest strap,Bracketing chest can be concentrated when moving wearing by providing,Sizing is not easy to shake,The wonderful effect not exposed,This creation can be made into long sleeves,Gown kenel to be worn in response to season,The energy foundation body temperature position on outer layer elastical cloth,Different density is woven to increase heat-dissipation sweating efficiency,The frivolous tool elasticity of one integral piece,Not only wearing comfort during exercise,Sleep can also wear no pressure,And it can set and knit out various floral designs,Thereby set off out personal taste in clothes,Modish and practical athletic undergarment.本創作係關於一種無縫運動內衣，該運動內衣具有內外層結構，外層為彈性布，該彈性布之左右橫織面為無接縫，該彈性布於上圍內層結合兩罩杯及止滑布條，兩罩杯之間車縫有一彈性連接布，該彈性布於下圍周緣車縫有一圈寬面束胸帶，提供在運動穿戴時能集中撐托胸部，定型不易晃動，不走光的妙效，本創作可製成長袖、長外衣型態以因應季節穿著，在外層彈性布上能依據體溫部位，編織為不同的疏密度以增加散熱排汗效率，整件輕薄具彈性，不只在運動時穿戴舒適，睡眠也可穿著無壓，並且可設定編織出各種花紋圖案，藉此來襯托出個人穿著品味，新潮又實用的運動內衣。
