Although the material shows wrinkles, there are no stains or tears. Worn a few times. Size is L. From the following website: "Just by wearing it, you'll remember your natural posture" - Improves the fundamental body's misalignment and improves posture. "Wearable core training" - Just by wearing it, a pleasant stimulation is transmitted to the postural muscles, improving posture-keeping ability. Excellent comfort! No feeling of tightness. A T-shirt with a comfortable feel made of high-quality inner material. What is the 3-point posture approach structure? The following three joints are related to improving posture: ① Shoulder joint (external rotation) - Opens shoulders that are rolled inward to the outside. ② Scapula (internal upward pull) - Brings together and pulls up the scapula that has opened outward and lowered. ③ Spine (extension) - Extends the spine that is rounded in a hunchback posture. A special fabric is sewn on the back of the innerwear to correct these three joints to their correct positions. The material, its shape, the sewing angle, and the direction of tension have been repeatedly tested and refined, with attention to detail. ・The design is also stylish. Wear it as a fashion item, just as it is, with a suit. ・Please use it for various sports. You can exercise while maintaining the correct posture. I think your sports performance will also improve. Running is especially recommended. It makes breathing easier, and your form improves, making it easier to run.