The most comfortable shorts you'll ever sweat in. Soft natural fiber, a hidden cooling pocket, and the important parts kept cool.
First batch is small. Early list gets first pick and founder pricing.
Washed-soft natural fiber, flat seams, and a waistband you forget about. No polyester against hot skin at 190°F.
The pocket is insulated on the outside, so the insert cools you and not the sauna. A soft layer next to skin keeps it comfortable.
A 5" inseam and a built-in liner, made for co-ed gym and spa saunas. Nobody needs to know what's in your pocket.
A study in Human Reproduction found that regular sauna sessions raised scrotal temperature by about 3°C and lowered sperm count and motility. It came back to normal months after the men stopped.
Garolla et al., Human Reproduction, 2013.
Sauna is great for you. We just think the boys deserve a break. Cool Whites keeps them cool while the rest of you gets the heat.
I've spent my life outside: running, mountaineering, biking. I once held the (unofficial) burpee mile world record, and these days I go burpee hiking, which is exactly as fun as it sounds. Sauna is how I recover.
I fell for it in college in Dublin, when I went every day after training. Now it's the sauna at my gym in Boulder, in running shorts like everyone else.
Then I read what regular heat does down there. The cooling gear I found was synthetic briefs that you can't wear in a co-ed sauna. So I'm making the shorts I wanted: the most comfortable pair I own, natural fiber, with a hidden cooling pocket.
— Alex, founder
Founder price for the first batch (retail $84). Reserve yours with a fully refundable $10 deposit. Ships spring 2027. Includes two cooling inserts.
Reserve for $10Deposits open in a few days. Leave your email and you'll get the link first, with founder pricing held for you.
Refund any time before it ships, no questions asked.
We're testing inserts in real saunas now. Our goal is a full 20-minute session. Early-list members get the test results first.
You don't need a cooler. Freeze it at home, and it travels in an insulated wool sleeve in your gym bag. We're testing exactly how long it holds, and we'll publish the numbers.
We won't claim that. The research shows heat affects sperm. Keeping things cool is the simple, sensible move.
Linen dries fast, breathes, and handles heat. Traditional sauna cultures have used natural fibers for centuries. Synthetics hold sweat and can feel hot against your skin.
Boulder, Colorado.