1 Pack Mens Extra Long Knee High Wool Thermal Welly Boot SocksMens Storm Bloc Extra Long Wool Boot Socks An extra long pair of wool socks is an essential item for any man's sock drawer. With these Storm Bloc mens anti abrasion wool long boot socks you have the pick of the bunch with its advanced fibres durability and thermal processes. These socks have a high wool content. In the winter wool is great for holding warm air close to the skin which is essential especially if you are outdoors in the colder months.