Thunderpants organic cotton and elastane fabric is super stretchy, comfy and easy-fit. There’s no nasty, scratchy elastic that digs in making them the ultimate comfy undie.

The undie styles are designed to sit in the natural curves of the body and are cut with plenty of fabric to cover your bum. Because our fabric is a bit thicker than you may be used to and has great retention and recovery, they may feel like they fit a bit tighter. 

See the size guide below to help you choose the right size. If you happen to fall between the measurements in the undies, we recommend going up a size rather than down.... Our fabric is stretchy enough that a bigger size will often still fit, but won’t feel as tight. For the other garments, Bike Shorts, Leggings, and Camis, you should be ok in the same size as your Thundies but obviously all bodies are unique and how you want to wear them varies. 

The sizes are standard UK sizes. 

Hipster vs Original vs Sky Rise?

The three styles are exactly the same around the legs and bottom, the hipster is low rise sits on your low hip, the originals are higher and usually fall just below the belly button, and the sky rise are a high waisted that taper in at the top to sit on your natural waist.

Briefs and Boxers

Kids