Flex Trunks

$ 640.00 28 reviews

Flex Trunks

$ 640.00 28 reviews

Our Flex Trunk Underwear style has been completely upgraded! Designed to be performance ready, the custom flex-knit fabric blend offers complete support, breathability and cool touch mesh for optimal temperature control.Learn More

Style
Trunks Boxer Briefs
ColorBlack
Black
Storm
Steel
Dark-Olive
Dark-Charcoal
Navy
Size Size Guide
Trunk Size Chart

Fit Profile: True to Size

Size: S M L XL 2XL 3XL
Waist: 28-30" 31-33" 34-36" 37-39" 40-42"
43-46"
Leg Opening: 26" 15" 15.5" 16.5" 17.5" 18.5"
Outseam: 9.25" 9.75" 10.25" 10.75" 11.25" 11.75"

  *Standard Trunk Size Guide Measurements:

Waist: Circumference measurement of waist. Trunks are designed to fit above the hips.

OutseamMeasure the length from the intersection of the waistband & hip to the bottom hem, follow the outer seam.

*Product measurements can vary by 1/2" 

Care Instructions: Machine wash cold with like colors. Tumble dry low. Do not iron.

Your purchase includes our "Love Your Fit" guarantee

If you don't love the fit, send it back and we'll exchange the size so you're happy.

 

Bundle & Save 3-Pack

Flex Trunks

Our Flex Trunk Underwear style has been completely upgraded! Designed to be performance ready, the custom flex-knit fabric blend offers complete support, breathability and cool touch mesh for optimal temperature control.

Now in all around enhanced fabric, experience improved support with improved breathability and ultimate flex-fit comfort. 

STYLE WITH

Customer Reviews
4.8 Based on 28 Reviews
5 ★
86% 
24
4 ★
11% 
3
3 ★
3% 
1
2 ★
0% 
0
1 ★
0% 
0
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  • quality
  • stretch
  • snake
  • trunk version
  • thigh area
  • garment
  • size med
  • expectation
  • mask
  • train
L
08/31/2024
Luis SVG verified by SHOP
United States

The best trunks I ever had period

M
08/24/2024
Mitch SVG verified by SHOP
United States United States

Great trunks for 7" inseam shorts.

C
08/23/2024
Chris
United States United States
I recommend this product
  • Size Runs SmallTrue to SizeRuns Large
  • Your Size in Tops SmallMediumLargeX-LargeXX-Large
  • Your Size in Bottoms SmallMediumLargeX-LargeXX-Large
  • Comfort UncomfortableAverageVery Comfortable

Runs small

Originally, I got a free pair of underwear. It was the all day wear version. Not the trunk version. I'm not a big guy. I'm 5'6 and weigh about 142lbs. The thigh area is pretty tight. I wished there was a bit more stretch. A few months ago I bought a pair of their trunk version underwear. Unfortunately, it runs way too small in the waist area. The size for a med is 31 to 33. Its definitely more closer to the 31 inch waist area. . I wear a med. I've bought plenty of underwear in the past of size med with generally no issues. But these med size are too uncomfortable in a med for me. I suggest 1 size larger. I'm hoping a large size will be much more comfortable.

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