Trainer Trunk

Color *
Size *

Wear the underwear that athletic men are calling a total game-changer! O ur best-selling Trainer Trunk (Boxer Brief) was named one of the Top 10 Athletic Underwear in "Men's Health" Magazine!

The Trainer Trunk is optimal for physical, high-impact activity. It has the athletic support of a jock strap, as well as the coverage and comfort of traditional underwear.  The full frontal anatomical pouch provides maximum support, while the tight fit prevents them from riding up or down.  Made of 95% Cotton and 5% Elastane.

  • Provides athletic support
  • Full frontal anatomical pouch provides maximum support *Recommended for men who need more room up front
  • Fully functional horizontal fly
  • Flat seam reduce unwanted rubbing
  • Machine wash warm. Tumble dry

Size Chart

Other Details


5 Average based on 16 reviews Write a Review
Written by Josh on 11th Dec 2019

Great Fit

These fit great. Holds everything in place to move with your body with quick easy access when you need it!

Written by Big D on 25th May 2019


An excellent product! Wonderfully comfortable and can be a tad provocative if that’s what you’re looking for. I’ll be ordering more!

Written by Aaron on 28th Jun 2018

Pure Pleasure

Several friends tried Jack Adams several years ago at my suggestion based on my positive response to the reviews, but I only tried them a few weeks ago. Based on the superior fit, ease in dealing with bathroom visits and just overall comfort down there, I now have 10 pair and wear them everyday. I am a Jack Adams fan for life.

Written by Ted D. on 17th May 2018

Impressive Trunks

I love the look and feel of the camo trunks. They fit me perfectly. I will definitely buy these again.

Written by undefined on 26th May 2017

camo cool

Fantastic fit comfortable and fashionable. Would order more.

Written by JB on 26th Apr 2017

Nice Fit & Fabric

These are comfortable and are made of nice fabric. I like the fit of the legs, and they stay in place. The camo version has a flannel-like feel. I liked them enough to get one in each color. I thought at first they might be good as work-out shorts, but I haven't tried that in public yet. I don't have to tug and rearrange things in the pouch too much. There is a bit of a push-up effect to the cut of the pouch that I wasn't expecting, so it takes a little getting used to, and it sometimes feels a little crowded in there, but it's still comfortable.

Written by Guest on 15th Apr 2017

Best Underwear

Fits great, real comfortable, will be buying more, definitely recommend.

Written by Jared on 12th Apr 2017

Trainer Trunk

Great item, comfortable fit! Camo is sexy.

Written by Gene on 1st Apr 2017

Best Product

Will buy more of these for everyday use. Great choice.

Written by Al on 30th Mar 2017


have 3 pair of the trainer trunk now 2 surf and one charcoal and love the fit, my package no longer gets squished i will be buying more when i see some new colours