Main Fabric Composition: Nylon SOFT and BREATHABLE:Our mens body shaper shirt are made of a silky and breathable fabric designed to comfortably wear all day, heat absorbing and sweat releasing. Above the chest, mesh splicing is designed to provide breathability to perspiration prone areas, allowing sweat to evaporate quickly and keep cool. QUALITY FABRIC and STRONG SEWING:This compression vest for men gynecomastia is soft, comfortable and strong. Shows strength and reliability on the seams and capable of holding up to the tugging and pulling. Skin-friendly material will keep your skin from itching and scratching. BACK SUPPORT and PREVENT ROLL UP:Collecting a lot of customer feedback, we have improved the length and position of the back embedded steel bone. The shorter steel bone and lift the position of the steel bone ensure adequate support at the waist while keep it from poking your skin. And this waist trainer vest for men doesn't roll up if you race your arms or sit down. Size: M, L, XL, XXL, XXXL(optional) Color:Black, White(optional) Package List: 1 x Men Waist Trimmer Belt