Linen compress Ideal for hot, also works in cold – Strong, effective for all osteo-articular and muscular relief. Hot use Fold the compress in half and place it in the microwave (power between 700 and 900 watts maximum) for 2 to 3 minutes. Mix well at the outlet to distribute the heat and insert it into its washable cover then apply it to the area to be treated. Cold use Put the compress in a plastic bag to protect it from humidity and place it in the freezer for 30 minutes to 2 hours. Insert it in its washable cover then apply it to the area to be treated. Precaution for use Avoid contact with fatty substances (creams, oils, etc.). Do not heat in a water bath. Do not apply directly to the skin (risk of burns).