Take the thin socks and sew them together at the cuffs, leaving about a 1-inch gap. Fill each sack with a bag of beans and then finish up the sewing job around the cuffs. This will be the inside bag for your heating pad.
Now take your cute and cozy socks and sew them together with a hole big enough to fit the thin socks filled with beans into them. Once you have the thin socks inside the cozy socks, finish up the sewing job! You’re all done! You just need to throw the heating pad in the microwave for about thirty seconds or so and then let it work its magic!