Barely There Jeanious Panties
These panties are silky, and are perfect under jeans. They never ride up on me, they come in a ton of colors and cuts, and they are easy to find. The also have a slight V shape to the front and back to prevent your panties from peeking out over your jeans, but are still high enough to cover what needs to be covered. I've found them at my local Leggs-Hanes-Bali store, and Kohls. You can also find them online, ranging in price from $5-$9.
Trust me, you'll love 'em!