Isn't it so sad when you find your favorite sweater got eaten by moths (or whoever it is!) from sitting in the closet for few seasons? I had this lovely indian pink sweater that my mom gave me, and I found few holes!
Given that I'm a fiber-lady, I decided to use complementary shade of wool fibers to needle felt on the hole. Just grab a 'fingerful' of loose wool fibers, bunch them up and start needle felting on the sweater. And voila! The sweater will now have some polkadots (that's the look), and is hole-free :)