My DS (10) was freezing last week. He asked me if there was anything he could wear under his jeans to keep his legs warm. He doesn't like leggings/under armor as they bunch up with his socks. My DD (12) told him that socks that go over his knees or thick tights could do the trick. He wants to give both long socks and tights a try. I've looked and have not been able to find any socks that go over his knees. Any ideas? And would tights be okay to wear under his jeans/shorts? What has worked for your DS?