From Rad Patterns:
The Panel Undies Pattern is a versatile sewing pattern to give you the most comfortable underwear with a built in way to add fun color blocking! They are virtually wedgie-proof, and come with several silhouette and edging options to give you exactly the fit and feel you want.
This pattern includes options for hipster, mid-rise brief, and high-rise brief. With detailed instructions for edging them using lingerie elastic, FOE, binding, or bands as well as instructions for optional ruching along the booty for an extra feminine touch.
The Panel Undies are great for all levels of sewing. This pattern is made to use knit fabrics with at least 50% stretch in both directions. Cotton Lycra is the recommended fabric.