EFFECT: STOX Energy Socks contain compression. This improves blood circulation in the legs. This reduces the risk of traveler's thrombosis (DVT) and prevents swollen feet and legs. After a 5-hour flight, 60% of travelers with compression stockings experience less pain and swollen feet. COMFORTABLE FIT: These socks are specially designed for travelers. The sock has a seamless design and is made of merino wool. SUPERIOR QUALITY: STOX Energy Socks are premium compression socks made of high quality and durable materials. Pressure class 2 Compression (23-32 mmHg). 100% Made in Italy. WARRANTY: 30 days money back guarantee and free shipping on all orders. Already more than 250,000 satisfied users. Rated 4.6 out of 5 on Trustpilot based on 13,000 reviews.