Ugg boots, a type of sheepskin boot created in Australia, are known for their extreme comfort and warmth. The name "Ugg" comes from the appearance of the boot, which is rather unattractive. Ugg boots can come with leather or suede uppers. If the boots are made with suede, oil softening is not recommended as oil can stain and damage suede. If the boots are covered in leather, oil softening is an excellent way to preserve the leather and keep it soft and supple for years. Choose either a leather conditioner or olive oil to soften your Ugg sheepskin boots.
Purchase a leather conditioning oil from a home supply or fabric store. Many conditioning oils and formulas are sold specifically for Ugg boots, so for best results use one of these formulas.
Apply the leather conditioner like shoe polish. Start with a small amount and work into the outside of the boot. Keep adding conditioner until the boot will not accept any more oil. This treatment will also protect the boots from stains and water damage. If desired, you can dilute regular leather cleaner to half strength with water for a lighter cleanse. This method will not soften the boot as much but is better for suede uppers.
Eliminate dirt and moisture with cornstarch. Place 2 tbsps. of cornstarch inside the boot and allow to sit overnight. The next day shake the cornstarch out of the boot.
Purchase an essential oil from a home supply store. Scents like lavender, peppermint and florals are the most powerful. Add one to two drops of oil inside the boot and rub it into the sheepskin with your hands. Allow to dry for about an hour before wearing the boot.
Purchase some olive oil at a market or grocery store. Any quality of olive oil is suitable. This method is an alternative to leather conditioners and provides similar results.
Drop a few drops of olive oil on the surface of a freshly cleaned boot. Work the oil into the surface of the leather with a soft cloth. Spread the oil around until it becomes completely absorbed by the leather.
Add a few more drops of oil if the leather still feels rough. Continue until the boots feel soft and supple. This will generally occur right around the time the leather refuses to accept any additional oil. Wipe off excess oil with a dry, soft cloth. Olive oil has the additional benefit of cleaning dirt and other contaminants from the boots that other cleaners may have missed.