Page: SwampButt Home

Underwear That Stops Sweat From Showing Through Your Pants.

Moisture-wicking underwear for men who sweat – even when
sitting, commuting, or working all day.

Great glavins’ ghost! The science of SwampButt Underwear.

How it Works

What Is SwampButt Underwear Made From?

SwampButt Underwear performance undergarments are made from a blend of lycra and polyester fibers and chelated silver. SwampButt Underwear fits snuggly, does not droop or bunch up in a wet knot between the thighs like traditional men’s underwear does. SwampButt Underwear is made in the USA.

How Does SwampButt Underwear Work?

How the undergarment works and what it is made of are related. First, there is the phenomena of ‘wicking’ which is the way moisture travels across a larger area of fabric. The more and further moisture (in this case sweat) can disperse across a surface, the faster it can evaporate. Imagine a squeegee pulling water across a windshield. When spread to a larger surface are, the water on the windshield evaporates faster. Or push rain water across a drive way or parking lot into a larger surface area and it also evaporates faster.

The same thing happens with our garment. Sweat wicks across a larger area and evaporates faster because of this. The rate of wicking is related to the materials and the way sweat spreads across them. Polyester fibers are hydrophobic because they are really plastic and will not absorb moisture. Our performance undergarments are made from lycra and polyester fibers. The brief style from cotton and lycra.

Buying underwear online can feel tricky. If your first pair does not fit or feel right, contact us within 30 days and we’ll help make it right. Need help choosing a size? Check the size chart or contact us before ordering.

Remember, free shipping on orders on $35.00 or more!

Our Blog Post

Conditions were especially severe during Texas’ 59–7 victory over Texas State in Austin. The temperature reached 102 degrees, with a reported feels-like temperature of approximately 104 to 105. A widely circulated photograph showed spectators crowded beneath the stadium seeking shade.

SwampButt Scale of Sultry Sweats Out a 61% Win Rate

September 9, 2026

A college football prediction model that ignored rankings, betting lines, coaching, injuries and player talent correctly selected 55 of 90 Week 1 winners. The SwampButt Underwear™ Scale of Sultry finished the first full week of the 2026 college football season with a 55–35 record—61% accuracy—after making every selection using one deliberately narrow variable: which team was accustomed to the hotter and more humid home environment.

SwampButt Underwear Scale of Sultry heat map for week one.

SwampButt Underwear Scale of Sultry Week One

September 9, 2026

The SwampButt Underwear Scale of Sultry for Week One was plenty sultry and in places dangerously hot.

Gift Cards

For those last minute gifts or the ones you may have forgotten about. The SwampButt Underwear Gift Card is perfect for Christmas or any occasion. Shipping is free because these cards are sent via e-mail. These cards will not expire, always redeemable!