If you think you’ll be too hot in a sweatsuit, you could go with a long sleeve shirt instead. Sweatpants are probably your best option for pants unless you want to choose some tights, leggings, or other simple black or white pants. If you use clothes you already have rather than buying new ones for the costume, remember that you’ll be using glue that is permanent. Once you make the costume, the clothes are ruined for regular wear.
Cotton balls can be purchased at any big-box store or pharmacy. Batting can be purchased at big-box stores, but you might have to go to a craft store. Cotton balls give a more textured and authentic look, but cotton batting will attach much faster and cover more space. If you are in a hurry, don’t use cotton balls.
You don’t have to cover the entire surface of the clothes with cotton. You can leave a few inches at the end of the sleeves and pant legs to mimic the way that a sheep’s wool stops before the hooves.
Be creative to make the ears look the way you want them to. Stuff a few cotton balls or a chunk of polyfill between the pieces of felt before you sew them together to make the ears look plump. Use black and white paper or another fabric besides felt if you don’t have felt or don’t want to buy any. Use only one piece of felt for each ear if you don’t want them double thick.
If you don’t want to attach ears to the beanie, put the headband with ears over the beanie.
Place a six or seven dots of paint on your top lip under your nose like whiskers and add red lipstick to make the look pop.