Pantyhose under my breeches...equestrian question?

So I'm seventeen, and I do mostly jumping. I usually wear these panties: http://rs.runningwarehouse.com/rw/big/MCWMB-BK-big.jpg, because my parents won't let me wear thongs, Under these breeches: http://www.breechesusa.com/index.php?main_page=product_info&cPath=3_31&products_id=82. Anyway, the panties show through the breeches, and its sooo embarring, plus the panties feel like diapers. So I'm wondering if pantyhose under the breeches would work. Would they hide the panties? Or am I stuck with panty lines?