90% organically grown cotton 10% spandex Wedgie proof Made locally and lovingly in Portland, OR The original comfy undies that don't go up your bum. This high waisted brief sits in the natural crease at the top of the leg and just under the navel. Thunderpants are cut with enough fabric to cover your rear end and the comfy bands hold them in place so even the most active folk will no longer need to readjust their underwear. Complete your set with the Patterned Bralette. Care: To preserve the vibrant colors and life of the fabric we suggest you do not soak or bleach your Thunderpants items. Use a gentle detergent in a cold machine wash and dry your Thunderpants on the line (they will survive drying on low, but may fade a bit).