Runderwear Men's Merino Briefs | Chafe-Free Performance Underwear with Premium Merino Wool

Very comfortable briefs. They have quite a bit of stretch and I think I'm at bottom end for XL (I'm 38"). Just enough support for people who don't like the lack of support found in boxers. If they were a bit less expensive I'd buy a couple more pairs and wear them every day.

Quite pricey but work really well with running tights

Love them for cycling

These work very well! Used them for the marathon and had no problems.

So glad I found this product! Lightweight, comfortable and well made, this underwear will be my choice in future. Highly reccommended. No problems or issues with this company either and will definitely use them again.

I got a size up, L instead of M, and these were still much too tight around the legs. I would have to get three sizes up for these to be a comfortable fit.. Also I thought these would be made of 100% merino wool but they are only 40% merino

If I could give these less than one star, I would. Supposedly chafe-free, these briefs actually gave me chafing that I'd never had before. And now I am in a constant battle to try and heal the affected area before I go out for a run again - often twice a day. There's no doubt I'll now line up for the Frankfurt Marathon in October, already chafed. God knows what I'll look like by the end!

Fantastic product - cant recommend enough