If these aren't the best boxers you've ever worn,you get your money back.No hassle.

BioFit Origins — 1, 4, 7, 10 Packs

BioFit Origins: The first layer of the man becoming more.

4.6/5 (2,500+ reviews)

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ONLY TODAY

365-Day Wear Test

If they don’t hold up, we’ll replace them free. No hassle.

ONLY TODAY

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If these aren't the best boxers you've ever worn,you get your money back.No hassle.

What makes Biofit different from regular underwear?

Biofit underwear is engineered with advanced moisture-wicking technology and antimicrobial fibers that keep you dry and odor-free all day. Unlike regular cotton underwear that traps moisture and bacteria, our proprietary fabric blend features seamless construction, ergonomic fit zones, and temperature-regulating properties. The four-way stretch material moves with your body while maintaining its shape, and the flatlock seams eliminate chafing and irritation. Plus, our sustainable bamboo-blend fibers are naturally hypoallergenic and incredibly soft against your skin.

Do these run true to size?

Yes, Biofit underwear is designed to run true to size with our precision sizing system. We recommend checking our detailed size chart, which includes measurements for waist, hips, and rise to ensure the perfect fit. Our underwear features a flexible waistband that adapts to your body without rolling or digging in. If you're between sizes, we suggest sizing down for a more athletic fit or sizing up for a relaxed comfort fit. We also offer a 30-day fit guarantee – if the size isn't quite right, we'll exchange it for free.

What if I don't like them?

We stand behind our product with a 60-day satisfaction guarantee. If you're not completely happy with your Biofit underwear for any reason, simply return them for a full refund – even if they've been worn and washed. We believe in our quality so much that we want you to truly experience the difference. Just contact our customer service team, and we'll provide a prepaid return label. No questions asked, no hassle. Your comfort and satisfaction are our top priorities, and we're confident you'll love the Biofit difference.

What Men Are Saying

What Our Happy Customers Say

Great quality product

This product exceeded my expectations. The quality is outstanding and the customer service was excellent.

John Smith,

September 16

Got my new boxers today and they are…

Got my new boxers today and they are great!! Glad I checked the reviews first and ordered size 2xl so good job I checked the size guide before ordering! Excellent quality and feel great! 👍

Mr P BEND,

September 16

Great quality boxers

This is the second time I have bought these boxers The first disappeared very quickly with my son and nephew taking them before I could use them

Sandra Stephen,

August 25

Great quality product

This product exceeded my expectations. The quality is outstanding and the customer service was excellent.

John Smith,

September 16

Great quality product

This product exceeded my expectations. The quality is outstanding and the customer service was excellent.

John Smith,

September 16

Got my new boxers today and they are…

Got my new boxers today and they are great!! Glad I checked the reviews first and ordered size 2xl so good job I checked the size guide before ordering! Excellent quality and feel great! 👍

Mr P BEND,

September 16

Great quality product

Great quality product and lovely feel to the fabric. I received the wrong size (my own fault) but the company was brilliant to deal with and really helpful in sorting my mistake out.

D Cosgrove,

July 21

Rated 4.6 / 5 based on 2,607 reviews. Showing our favorite reviews.

Showing our favorite reviews.

Trustpilot

What makes BIOFIT so special?

Ultimate Comfort

Experience unparalleled comfort with Biofit Bamboo Boxers. Designed to feel like a second skin.

Our bamboo material is not just soft; it's super breathable, ensuring you stay comfortable and dry all day long.

Convenient & Durable

Built to last with premium bamboo fibers that maintain their shape and softness wash after wash.

Machine washable and quick-drying, making them perfect for your active lifestyle.

The Wise Choice

Make the sustainable choice without compromising on quality or comfort.

Bamboo is naturally antibacterial and hypoallergenic, keeping you fresh and confident all day long.

Proven Comfort, Measurable Results

92%

Felt cool & dry throughout the day

*Based on a 4-week customer panel

89%

Made zero adjustments all day

*Based on a 4-week customer panel

87%

Noticed less irritation and chafing

*Based on a 4-week customer panel

Designed for Calm Comfort

Bamboo underwear that disappears on the body, moves when you do, and keeps its cool—precise cuts and breathable fabric for all-day comfort without constant readjustments.

Second-Skin Softness — Disappears on the body

All-Day Comfort — Moves with you, stays put

Reduces Skin Irritation — Less chafe, less friction

Stay Cool & Fresh — Breathable, moisture-wicking

Questions? We've Got Answers

How comfortable are Biofit Bamboo Boxers?

Our bamboo boxers are designed with ultimate comfort in mind. The natural properties of bamboo fiber make them incredibly soft, breathable, and moisture-wicking, keeping you comfortable all day long. The fabric is naturally hypoallergenic and temperature-regulating, making them perfect for all-day wear.

What makes the material of Biofit Bamboo Boxers so soft?

Bamboo fibers have a naturally round and smooth structure, which gives them an incredibly soft feel against the skin. The fabric is also processed using eco-friendly methods that preserve this natural softness. Additionally, bamboo contains "bamboo kun," a natural antimicrobial agent that keeps the fabric fresh and odor-free.

Can you tell me more about your shipping policies?

We offer free shipping on all orders over $50. Standard shipping typically takes 3-5 business days, while express shipping delivers within 1-2 business days. All orders are tracked and you'll receive a confirmation email with tracking information once your order ships. We ship to all 50 states and internationally to select countries.

How do you balance affordability with high quality in your products?

We work directly with sustainable bamboo farms and manufacturers, cutting out middlemen to keep costs down. Our direct-to-consumer model allows us to offer premium quality at fair prices. We believe everyone deserves comfortable, sustainable underwear without breaking the bank. Plus, our products are built to last, providing better value over time.