Cascade 220 would work well for this project.
Create a classic stripe or sheep design. Note: Choose a wool or other natural fibre that will felt easily. Some white yarn does not felt well - the sheep design uses grey for felting.
Striped stocking: 200 yards of main color and 100 yards of contrast.
Sheep stocking: 200 yards of main color, 100 yards of sheep color and a small amount of black for ears, feet, face and tail.