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Take a soft, clean cloth and dip it in petroleum jelly or squirt it with baby oil. Rub the cloth over the entire outside of the boots to soften the leather. This will prevent creases from forming that will dig into your feet and make your new shoes uncomfortable. Over the course of several weeks, you should continue to apply either baby oil or petroleum jelly to the outside of the boots twice per day. Until your Docs are broken in, you’ll need blister cushions to protect your feet. Put on your new Doc Martens, walk around your home, and pay attention to where the boot or shoe digs in or rubs against your skin. Then, simply cut blister cushions to fit those areas and apply them to your skin. Blister cushions are available at your local shoe store, drugstore, or supermarket. New Doc Martens are quite sturdy and stiff, making them a bit uncomfortable. To cushion your feet, be sure to wear thick socks, like those made of wool, with your Doc Martens until they are broken in. Thereafter, you can stick with thick socks, go for thin ones, or even pair your Docs with tights. In between applications of petroleum jelly or baby oil, wear the boots around your home for short periods of time to help them break in. Don’t plan on wearing a brand new pair for a full day or while walking or hiking, as you’ll likely get blisters on your feet. Slowly increase the amount time you wear them per day until they are comfortable enough to wear anywhere.

Summary:
Apply petroleum jelly to the outside of leather Docs twice a day. Use blister cushions to prevent blisters. Wear thick socks with Doc Martens. Wear Doc Martens for short periods of time until they are broken in.