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Jack Adams Zen Modal Brief in black (profile view) - men&
Jack Adams Zen Modal Brief in black (back view) - men&
Man wearing light blue underwear with &
Man standing wearing a pair of Jack Adams peacoat blue Zen Modal Brief (profile view) on a white background.
Man wearing Jack Adams gray Zen Modal Brief underwear on a white background
Man standing wearing a pair of Jack Adams italian plum Zen Modal Brief (profile view) on a white background.
Man standing wearing a pair of Jack Adams royal Zen Modal Brief (profile view) on a white background.
Jack Adams Zen Modal Brief in black (profile view) - men&
Jack Adams Zen Modal Brief in black (back view) - men&

Zen Modal Horizontal Fly Brief

$32.00 $19.00
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Zen Modal Brief delivers a clean, supportive fit, cooling performance, and a silky-soft feel that makes it a standout everyday essential. Crafted from lightweight TENCEL™ Modal, the fabric is exceptionally breathable, moisture‑wicking, quick‑drying, and smooth against the skin—creating that barely‑there comfort men look for in premium modal underwear. The original horizontal fly offers fast, easy access, while the contour pouch gently lifts and supports for a natural, secure fit. With its low‑bulk silhouette, cool‑to‑the‑touch fabric, and all‑day comfort, this brief is ideal for men searching for soft modal briefs, horizontal fly underwear, no‑ride support, and lightweight men's underwear that feels like wearing nothing at all.  Shop the collection.
SIZE - True to size
  • Brief underwear
  • Sits at the natural waistline.
  • Horizontal Fly is a solution to the ‘fly fishing' caused by vertical and no-fly underwear. A uniquely intuitive horizontal opening for fast and easy access when nature calls.
  • Supportive pouch design for men who need more support and comfort.
  • Chafe-free flatlock stitching.
  • Ultra soft, smooth feel.
  • No-roll elastic waistband
  • Size: Model is 6’ 1” and is wearing a size medium
  • Fabric 95% Modal, 5% Elastane
  • Shrinkage and pilling resist.
  • Machine wash cold water. Do not bleach. Hang to dry.

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Jack Adams™ underwear and shorts/pants sizing is measured at the waist. To find your correct waist size, measure your torso about one inch below the belly button. To find your size in all of our tops and hoodies, measure your chest around, at approximately one inch below your arm pit. 

Size Chart - INCHES

SIZES (inches) S M L XL XXL 
CHEST 35-37 38-40 41-43 44-47 N/A
NECK 14-14.5 15-15.5 16-16.5 17-17.5 N/A
WAIST 27-29 30-32 33-35 36-38 38-43

 Size Chart - METRIC

SIZES (cm) S M L XL XXL 
CHEST 89-94 97-101 104-109 112-118 N/A
NECK 36-37 38-39 41-42 43-44 N/A
WAIST 69-73 76-81 84-89 91-97 97-109

 

 

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