Ansilk-Pro J These stockings fit the ankles and calves and have a high compression force (18mmHg). The calves, known as the "second heart," tend to swell in the evening. The compression of the stockings helps the pumping action of the calves. For those with severe swelling. Also for those undergoing surgery, and after surgery. For those who frequently wake up to use the toilet at night, it is said that urinating the fluid that causes swelling while awake can reduce the need to go to the toilet at night. Let's sleep soundly(^^) The recommended expiration date has passed, so the price has been reduced. How about a replacement? Ansilk-Pro - Brand: ALCARE - Product Name: Ansilk-Pro J - Size: S - Ankle Circumference: 17-21cm - Calf Circumference: 28-34cm - Compression: 18mmHg - Material: Nylon, Polyurethane Thank you for viewing.