YOUR health
YOUR health
YOUR health
STARTS
STARTS
STARTS
UNDERNEATH
UNDERNEATH
UNDERNEATH
UNDERNEATH
UNDERNEATH
UNDERNEATH
UNDERNEATH
UNDERNEATH
UNDERNEATH
ALL NEW JACK Briefs
ALL NEW JACK Briefs
ALL NEW JACK Briefs
We Got Tired of
We Got Tired of
We Got Tired of
SWEATY B*LLS
SWEATY B*LLS
SWEATY B*LLS
SWEATY B*LLS
THE men at Jack Health agreed: sweaty, uncomfortable days have to go. So, we created Jack’s Briefs with 93% modal—a plant-based fabric from the beech tree—to keep you cool and dry where it matters most.
The 3°C rule
The 3°C rule
The 3°C rule
The Science of Testicular Health
The Science of Testicular Health
Scientific studies have shown that testicular temperature affects sperm count and motility. If your testicles overheat, even slightly, it can interfere with sperm quality and overall reproductive health.
Scientific studies have shown that testicular temperature affects sperm count and motility. If your testicles overheat, even slightly, it can interfere with sperm quality and overall reproductive health.
Did you know that the ideal temperature for sperm production in the testicles is between 94°F and 96°F (35.5°C to 36°C), which is about 5.4°F (3°C) lower than normal body temperature
3°C
Did you know that the ideal temperature for sperm production in the testicles is between 94°F and 96°F (35.5°C to 36°C), which is about 5.4°F (3°C) lower than normal body temperature
3°C
Did you know that the ideal temperature for sperm production in the testicles is between 94°F and 96°F (35.5°C to 36°C), which is about 5.4°F (3°C) lower than normal body temperature
3°C
Pricing
Pricing
Pricing
Select Your
Select Your
Select Your
PACK / size
PACK / size
PACK / size
PACK / size
PACK / size
Naturally
breathable
The comfort you’ve always needed but never found — until now.
Simplified Crypto Travel Expenses
Pay in Any Country
Fitness and Wellness Services Payments
10% Cashback on Sports & Healthcare
Naturally
breathable
The comfort you’ve always needed but never found — until now.
Simplified Crypto Travel Expenses
Pay in Any Country
Fitness and Wellness Services Payments
10% Cashback on Sports & Healthcare
Naturally
breathable
The comfort you’ve always needed but never found — until now.
Simplified Crypto Travel Expenses
Pay in Any Country
Fitness and Wellness Services Payments
10% Cashback on Sports & Healthcare
Naturally
breathable
The comfort you’ve always needed but never found — until now.
PERFECT
STRETCH
Strong, flexible waistband that moves with you. No pinching, just comfort.
Fitness and Wellness Services Payments
10% Cashback on Sports & Healthcare
Naturally
breathable
The comfort you’ve always needed but never found — until now.
PERFECT
STRETCH
Strong, flexible waistband that moves with you. No pinching, just comfort.
Fitness and Wellness Services Payments
10% Cashback on Sports & Healthcare
Naturally
breathable
The comfort you’ve always needed but never found — until now.
Simplified Crypto Travel Expenses
Pay in Any Country
TOTAL
SUPPORT
Built-in pouch for secure, all-day comfort. TLC where it matters most.
Naturally
breathable
The comfort you’ve always needed but never found — until now.
Simplified Crypto Travel Expenses
Pay in Any Country
TOTAL
SUPPORT
Built-in pouch for secure, all-day comfort. TLC where it matters most.
Comfort that
Comfort that
Comfort that
Moves with You
Moves with You
Moves with You
Moves with You
Moves with You
01
93% plant-based modal: softer, cooler, and breathes better than cotton or polyester.
01
93% plant-based modal: softer, cooler, and breathes better than cotton or polyester.
01
93% plant-based modal: softer, cooler, and breathes better than cotton or polyester.
02
Crafted with 7% elastane for a high-strength elastic waistband that's both reliable and perfectly stretchy
02
Crafted with 7% elastane for a high-strength elastic waistband that's both reliable and perfectly stretchy
02
Crafted with 7% elastane for a high-strength elastic waistband that's both reliable and perfectly stretchy
03
Specially designed pouch to provide the support and comfort you deserrve
03
Specially designed pouch to provide the support and comfort you deserrve
03
Specially designed pouch to provide the support and comfort you deserrve
THE JACK BRIEFs is more durable and feels softer than cotton. Plus, it maintains moisture absorbing properties for ideal hygiene (unlike polyester).
THE JACK BRIEFs is more durable and feels softer than cotton. Plus, it maintains moisture absorbing properties for ideal hygiene (unlike polyester).
FAQ
FAQ
FAQ
your questions
answered
your questions
answered
your questions
answered
How long will shipping take?
Once your order is processed, shipping typically takes 2-5 business days to arrive. You’ll receive a tracking link as soon as your order ships, so you can follow its journey to your doorstep!
What materials are used in your underwear?
Jack’s briefs is crafted from 93% plant-based modal fabric, derived from the beech tree and 7% elastane. This modal 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?
Due to the intimate nature of briefs, we don’t accept returns or exchanges. We recommend using our size guide to choose the best fit, ensuring maximum comfort from the start.
How Do I Care for My Jack Briefs?
To keep your Jack Briefs in top condition:
Wash in cold water: Use a gentle cycle to maintain the softness and durability of the modal fabric.
Use mild detergent: Avoid bleach or harsh chemicals to protect the fabric.
Air dry: For best results, hang dry to maintain elasticity and prevent shrinkage.
Avoid high heat: If using a dryer, tumble dry on low heat.
How long will shipping take?
Once your order is processed, shipping typically takes 2-5 business days to arrive. You’ll receive a tracking link as soon as your order ships, so you can follow its journey to your doorstep!
What materials are used in your underwear?
Jack’s briefs is crafted from 93% plant-based modal fabric, derived from the beech tree and 7% elastane. This modal 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?
Due to the intimate nature of briefs, we don’t accept returns or exchanges. We recommend using our size guide to choose the best fit, ensuring maximum comfort from the start.
How Do I Care for My Jack Briefs?
To keep your Jack Briefs in top condition:
Wash in cold water: Use a gentle cycle to maintain the softness and durability of the modal fabric.
Use mild detergent: Avoid bleach or harsh chemicals to protect the fabric.
Air dry: For best results, hang dry to maintain elasticity and prevent shrinkage.
Avoid high heat: If using a dryer, tumble dry on low heat.
How long will shipping take?
Once your order is processed, shipping typically takes 2-5 business days to arrive. You’ll receive a tracking link as soon as your order ships, so you can follow its journey to your doorstep!
What materials are used in your underwear?
Jack’s briefs is crafted from 93% plant-based modal fabric, derived from the beech tree and 7% elastane. This modal 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?
Due to the intimate nature of briefs, we don’t accept returns or exchanges. We recommend using our size guide to choose the best fit, ensuring maximum comfort from the start.
How Do I Care for My Jack Briefs?
To keep your Jack Briefs in top condition:
Wash in cold water: Use a gentle cycle to maintain the softness and durability of the modal fabric.
Use mild detergent: Avoid bleach or harsh chemicals to protect the fabric.
Air dry: For best results, hang dry to maintain elasticity and prevent shrinkage.
Avoid high heat: If using a dryer, tumble dry on low heat.
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
