Smoothing and Slimming Riding Underwear for Equestrians. Seamless + a Perfect Under Your Breeches. We get the daily undies struggle, we're equestrians. The never-ending search for the perfect underwear to wear with your breeches. Ya, we know, they don't exist....until now! We are SO excited to bring you our solution! We've solved the ongoing issues with wearing "normal" underwear with your riding leggings + breeches.