Restore warmth and relieve aches and pains in your hands with our hand warmers. These reusable hand warmers come with a knitted cover. Directions for use: To activate: Flex the metal button until it clicks to activate the gel and hold for warmth. Several clicks may be required to activate the gel. The gel will harden as heat is released. To re-activate: Once the hand warmer has cooled, remove cover and boil the gel bottle in a pan of water until the gel returns to a liquid. Do not leave unattended. Do not allow the pan to boil dry. Leave to cool before removing from the pan. Always take care with boiling water. Care and use: 7cm x 13cm. Cover: 100% Acrylic. Cover: Machine wash 40°, do not bleach, dry flat, do not iron, do not dry clean.