To put this jumper on your pet, first hold it open and gently guide your pet's head through the neck hole. Then pull the jumper down over their body. Make sure it fits well without being too tight. When it comes to cleaning, it's best to use a gentle cycle in the washing machine with mild detergent. Avoid using bleach as it may damage the white skull design. After washing, let it air dry. Store it in a cool, dry place when not in use. Check the fit regularly as your pet grows to ensure continued comfort.