374 Reviews

The Jack Brief

Underwear engineered for men who want comfort and health: stay cool, stay dry, reduce sweat-related irritation.

BUY 3+, Save 16%

BUY 5+, SAVE 36%

BUY 7+, SAVE 46%

Select Size

XXL

HD Solids

Size Guide

SELECT A SIZE

BUY 3+, Save 16%

BUY 5+, SAVE 36%

BUY 7+, SAVE 46%

Select Size

XXL

HD Solids

Size Guide

SELECT A SIZE

Free Shipping on orders over $75

At Jack Health, we agree: sweaty, uncomfortable days have to go. Unlike cotton or polyester blends that trap heat, our modal fabric feels cooler instantly.

Keeps you dry even during hot days or workouts

Odor control so you stay fresh through your busiest hours

Supportive pouch design to reduce irritation and chafing

No-roll waistband that stays in place

Temperature regulating fabric

Material + Care

93% Modal / 7% Elastine
Machine wash cold with like colors
Tumble dry low
Imported
Avoid high heat
Use mild detergent

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FAQ

How long will shipping take?
We offer free shipping on all briefs orders within Canada. Due to high demand for our modal fabric, shipping is estimated to take 3-4 weeks from the order date. Thank you for your patience!
What materials are used in our underwear?
Jack’s briefs is crafted from 100% plant-based modal fabric, derived from the beech tree. This fabric is soft, breathable, and eco-friendly, providing a cooler, more comfortable option than traditional cotton or polyester.
Why do Jack Briefs only come in black?
We chose black because it’s classic, versatile, and practical. Black not only looks sleek but also minimizes visible wear and staining over time, keeping your briefs looking fresh longer. Plus, it’s a color that works for everyone!
Why did Jack Health launch an underwear line?
Jack Health’s mission is to support men’s health holistically, beyond just medications. Proper blood flow is essential for managing conditions like ED, and tight, non-breathable fabrics can cause heat and discomfort, impacting circulation. That’s why we created a plant-based, modal briefs designed for cooler, more breathable comfort that promotes better circulation.
Can I return or exchange my underwear? No returns for underwear.

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FAQ

How long will shipping take?
We offer free shipping across Canada. Due to high demand for our modal briefs, delivery takes 1–2 weeks from your order date. Thanks for your patience — we promise it’s worth the wait.
What materials are used in your underwear?
Our briefs are crafted from 100% plant-based modal, made from sustainable beech trees. This fabric is softer, cooler, and more breathable than cotton or polyester — eco-friendly comfort designed to keep you fresh all day.
Why do Jack Briefs only come in black?
Black is classic, versatile, and practical. It looks sleek, works with everything, and hides wear better over time — keeping your briefs looking (and feeling) fresh longer.
Why did Jack Health launch an underwear line?
At Jack Health, our mission goes beyond prescriptions. Circulation and comfort matter for men’s health. Tight, non-breathable fabrics can trap heat and restrict blood flow. Our modal briefs are cooler and more breathable, designed to support better circulation and overall well-being.
Can I return or exchange my underwear?
For hygiene reasons, underwear can’t be returned or exchanged once worn. But if you experience any issues with sizing or quality before use, please contact our support team and we’ll make it right.
- Wash cold: Gentle cycle to protect softness & durability.
- Mild detergent: Avoid bleach or harsh chemicals.
- Air dry: Best for elasticity and preventing shrinkage.
- Low heat if needed: Tumble dry on low.

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374 Reviews

The Jack Brief

STARTING AT CAD $16

Light as air — feels weightless.

100% plant-based modal fabric: softer, cooler, and more breathable than cotton, nylon, or polyester.

Light as air — feels weightless.

100% plant-based modal fabric: softer, cooler, and more breathable than cotton, nylon, or polyester.

Light as air — feels weightless.

100% plant-based modal fabric: softer, cooler, and more breathable than cotton, nylon, or polyester.

WHAT OUR CUSTOMERS ARE SAYING

Comfortable, cloth could breathe in hot humid weather, didn't show signs of wear. I picked these up on recommendation by a friend and he was right. They support where you need it, feel comfortable and haven't fallen apart after a month of daily use/changing, and weekly laundry After years of other brands' products falling apart, I'm happy spending a little more to get the best.

Randi

I picked up this 3-pack of JACK HEALTH men’s boxer briefs and I’ve been really impressed with them so far. Right out of the package, the fabric feels soft and lightweight but not flimsy, which gave me a good first impression.

Mandel

Ordered a medium and the fit is absolutely perfect. It feels so light and comfortable, almost like I’m not wearing anything at all. The fabric is soft and moves with you. One of the best pairs I’ve tried. Go for it!

Karthick

Got these for my son. I got him the L, since that is what he typically wears and these are true to size. They fit well and they are apparently very comfortable. The material is very soft/smooth and quite stretchy without being too tight. They have a good fit, and they have kept their shape and color even after over half a dozen washes so far and they are very good quality.

Emp

Join thousands of men taking charge and prioritizing their health.

Jack Health is Canada’s online men’s health clinic providing easy access to licensed Canadian clinicians, personalized treatment plans, and convenient home delivery.

Hey Al, learn about us

Find our blogs here

Join thousands of men taking charge and prioritizing their health.

Jack Health is Canada’s online men’s health clinic providing easy access to licensed Canadian clinicians, personalized treatment plans, and convenient home delivery.

Hey Al, learn about us

Find our blogs here

Treatments

Company

Medications

Join thousands of men taking charge and prioritizing their health.

Jack Health is Canada’s online men’s health clinic providing easy access to licensed Canadian clinicians, personalized treatment plans, and convenient home delivery.

Hey Al, learn about us

Find our blogs here

Treatments

Company

Medications