Thank you for viewing! This product is a 3XL (4L) size. Other sizes are also available! ■ For those who are concerned about ■ Easily get stiff shoulders due to desk work and computer work Long hours of smartphone use Want to improve posture but can't quite do it ■ Product Details ■ Ergonomically designed to support posture improvement Supports a wide range of concerns such as hunchback, stiff shoulders, and rounded shoulders The belt has Velcro, so you can adjust the tightness Mesh fabric for excellent breathability Unisex, washable, and easy to use ◎ ※ This product is not a medical device, but an item that supports posture. ※ Instructions are not included. Please check the product images for how to use it. ■ Size ■ Size: 3XL size (4L) Waist: Approximately 95-105cm ※ S, M, L, XL, and 2XL sizes are also available! ■ Material ■ 90% polyester, 10% polyurethane ■ Notes ■ To keep the product price down, we will ship it compactly Returns and exchanges are not accepted for reasons such as a different image or incorrect size If you have any questions, please comment before purchasing --- Discounts --- ◎ Set discount if you buy with other products ◎ Set discount if you buy multiple of the same product ◎ A small discount if you follow us (※ Please comment before purchasing)