Thank you for viewing! This is Dr. East's women's Derit Tech. The waist and abdominal area stretch incredibly well, providing a gentle tightening sensation that encourages good posture without feeling constricted or uncomfortable. When I wear these while working a job that requires standing or sitting for long periods, I feel that they reduce lower back pain and leg fatigue. Also, it seems they can positively impact performance when worn during sports or training. These are shorts to be worn directly on the skin, not girdles. Please give them a try! 《Product Details》 Dr. East DERIT TECH (Derit Tech) Women's Black, Size L, 1 piece Retail price: 7,800 yen (tax included) 《Condition》 Brand new, unopened, and unused 《Packaging》 Will be shipped in a water-resistant OPP bag. The following is the official product description: The uneven design with triangles on the fabric, aligned with the starting and ending points for muscle contraction, is calculated to naturally stimulate the muscles needed for all movements such as "standing," "walking," and "sitting." The shorts fit any movement, guiding the muscles around the pelvis to function correctly. This helps establish the habit of maintaining a beautiful posture. The S-curve of the spine is important for distributing the load on the body and maintaining correct posture. Derit Tech stabilizes the shoulder blades and spine just by wearing it, naturally guiding you to the ideal S-curve and conditioning your core.