UK Class 2 Graduated Compression 18-24mmHg Helps with the symptoms of varicose veins and also helps prevent DVT. Combining ultra-fine nylon and the smooth stretch of Lycra Soft Boosts natural blood flow Boosts natural blood flow Class 2 18-24mmHg graduated compression strength helps aliviate tired legs. Everyday lasting comfort and style technology and yarns are used to produce a high quality product that helps you to look and feel great.