Levi Jeans come with a [http://www.levistrauss.com/company/faq/levis.aspx|Full Warranty], so you may not even have to fix the jeans yourself. However, you can get a denim patch that you can sew over the hole or get a patch the you can iron on over the hole. In my experience, the ironing method is easier, but the sewing method lasts longer. You could do both to insure a long fix.