374 Reviews
The Jack Brief
Starting At CAD $16
Starting At CAD $16
Free Shipping on orders over $75
The men at Jack Health agreed: sweaty, uncomfortable days have to go. So, we created Jack’s Briefs with modal—a 100% plant-based fabric from the beech tree—to keep you cool and dry where it matters most.
Comfort fit waistband
Moisture-wicking & odor-fighting
Enhanced pouch support
No-roll waistband
Temperature regulating fabric
Material + Care
Material + Care
Material + Care
FAQ
FAQ
FAQ
374 Reviews
The Jack Brief
STARTING AT CAD $16
Light as Air.
100% plant based modal fabric: Softer, cooler, and breathes better than cotton, nylon or polyester.
Light as Air.
100% plant based modal fabric: Softer, cooler, and breathes better than cotton, nylon or polyester.
Light as Air.
100% plant based modal fabric: Softer, cooler, and breathes better than cotton, nylon or polyester.
WHAT OUR CUSTOMERS ARE SAYING
WHAT OUR CUSTOMERS ARE SAYING
WHAT OUR CUSTOMERS ARE SAYING
I never realised how much temperature regulation mattered until I tried these. The comfort is unmatched, and I feel more comfortable throughout the day.
John W
I never realised how much temperature regulation mattered until I tried these. The comfort is unmatched, and I feel more comfortable throughout the day.
John W
I never realised how much temperature regulation mattered until I tried these. The comfort is unmatched, and I feel more comfortable throughout the day.
John W
I didn’t think underwear could make this much of a difference. They’re cool, comfy, and I’ve already bought more pairs.
Chris L
I didn’t think underwear could make this much of a difference. They’re cool, comfy, and I’ve already bought more pairs.
Chris L
I didn’t think underwear could make this much of a difference. They’re cool, comfy, and I’ve already bought more pairs.
Chris L
These are the best for athletic days! They keep me dry, cool, and I don’t have to worry about discomfort. Plus, the health benefits are a huge bonus.
Matt S
These are the best for athletic days! They keep me dry, cool, and I don’t have to worry about discomfort. Plus, the health benefits are a huge bonus.
Matt S
These are the best for athletic days! They keep me dry, cool, and I don’t have to worry about discomfort. Plus, the health benefits are a huge bonus.
Matt S
I’ve tried all kinds of underwear, but nothing compares to these. Comfortable, breathable, and they really do make a difference in staying cool.
Kevin D
I’ve tried all kinds of underwear, but nothing compares to these. Comfortable, breathable, and they really do make a difference in staying cool.
Kevin D
I’ve tried all kinds of underwear, but nothing compares to these. Comfortable, breathable, and they really do make a difference in staying cool.
Kevin D
Jack Health is Canada’s online men’s health clinic providing easy access to licensed Canadian clinicians, personalized treatment plans, and convenient home delivery.
© 2025 Jack&Jill Health Inc.
Jack Health is Canada’s online men’s health clinic providing easy access to licensed Canadian clinicians, personalized treatment plans, and convenient home delivery.
© 2025 Jack&Jill Health Inc.
Treatments
Company
Medications
Jack Health is Canada’s online men’s health clinic providing easy access to licensed Canadian clinicians, personalized treatment plans, and convenient home delivery.
© 2025 Jack&Jill Health Inc.
Treatments
Company
Medications