Good boxers for use in everyday life and exercise, for the price worth
4.1 on Trustpilot · 3,604 reviews
Essentials Boxer Trunks 5-Pack Black | + 5 FREE
So soft you forget you're wearing them
92% viscose from bamboo, cool and dry all day
180 days quality-guarantee
What they're made of
92% viscose from bamboo, 8% spandex.
Viscose from bamboo is naturally softer than cotton: no sharp fibres, no irritation, no uncomfortable rubbing. It breathes in a way cotton simply can't, keeping you cool and dry whether you're at a desk, at the gym, or working outdoors.
They also hold up. Men are still wearing their first pairs twelve months later. Wash after wash, they keep their shape and their softness.
Wash at 30°C for best results.
Getting the right fit
Our fit runs true to size. Use the size guide to find your measurements and pick your size with confidence. Still unsure? Drop us a message, we'd rather take two minutes to help you get it right.
Delivery & guarantee
Dispatched within 48 hours. Delivered in 7–10 days across the UK.
Not satisfied? Return within 30 days for a full refund, no questions asked. We're confident you won't need it.
Effortless Comfort
No adjusting. No bunching. Just get on with your day.
Naturally Breathable
Viscose from bamboo breathes. Cotton doesn't. Cool and dry from morning to night.
These Last Long
Wash after wash. Still like new a year later.
Over 2 million pairs sold.
Once you try them, everything else feels wrong.
For the man who's been putting up with less.
You shouldn't have to think about what you're wearing.
Most men have spent years adjusting, readjusting, dealing with it. The waistband rolling, the fabric riding up, the constant discomfort that you've just... accepted.
Biofit's viscose from bamboo sits differently. Soft enough that you genuinely forget you're wearing them. No adjusting. No bunching. Just get on with your day, from the first hour to the last.
Alan K.G.
Verified Customer
★★★★★
“So comfy you almost forget you've got them on.”
Richard D.
Verified Customer
★★★★★
“They are so comfortable you don't even know you're wearing them, can't recommend them enough.”
Martin C.
Verified Customer
★★★★★
“Unbelievably comfortable! Ordered some more this morning.”
Cool and dry. All day. Whatever you're doing.
Cotton holds heat. Viscose from bamboo doesn't.
The difference becomes obvious by lunchtime on a warm day, or after half an hour at the gym, or on a long shift outdoors.
92% viscose from bamboo means the fabric breathes naturally, moisture moves away from the skin, temperature stays regulated, freshness lasts. No sticking. No discomfort building through the day.
Nick D.
Verified Customer
★★★★★
“I'm in Italy, it's 33 degrees and my nuts aren't sweaty.”
Andy B.
Verified Customer
★★★★★
“Really good for preventing sweaty nads and build up of sweat around the area.”
Callum H.
Verified Customer
★★★★★
“Comfortable and breathable, especially for the warmer weather.”
One problem with boxers this good.
Men buying Biofit are still wearing their first pairs a year later, same softness, same fit, same shape after dozens of washes. No falling apart after a few months.
The 5+5 deal gives you 10 pairs in one go at £4.40 each. Enough to sort your drawer out properly and never think about it again.
Just make sure you order enough. Partners have a habit of claiming a pair or two for themselves. Which, fair warning, happens more than you'd think.
Clare C.
Verified Customer
★★★★★
“Much to my husband's absolute annoyance I've claimed a couple of pairs as my own... the comfort is unreal!”
Mat F.
Verified Customer
★★★★★
“I've binned all my cotton boxers off. These are way more comfortable and don't develop holes after a month.”
Alan K.
Verified Customer
★★★★★
“Been wearing Biofit Boxers for 12 months and they are fantastic, so comfortable that my regular pants were ditched almost immediately.”
180 days. If it's not right, we'll fix it.
If your boxers develop a quality issue within the first 180 days — a hole, a seam, anything that shouldn't happen — we'll replace them. No awkward back and forth. Just send us a photo and we'll sort it.
200,000 men who stopped settling.
Over 2 million pairs sold worldwide. Try them and you'll understand why they never went back.
A real person. Any time.
No question is too small. Whether you're unsure about sizing, wondering where your order is, or just need a hand, we're here. Drop us a message and we'll get back to you, as fast as we can.
Your order. At your door. No fuss.
Dispatched within 48 hours. Delivered in 7–10 days across the UK. Free delivery on orders from £39, so this pack ships free.
Customer Reviews
Overall rating: 4.8 / 5 from 111 reviews.
Let me tell you, I have bought these for my hubby and he said no bunching and no chafing. Honestly, we didn’t expect much, but these completely blew him away. He's hooked.
These are the kind of boxers you forget you’re wearing because they’re so comfortable.
The fabric is nice and light, very suitable for summer and exercises. The size was good, next time I will order a number above.
Seriously, these boxers are the real deal. I’m telling all my friends about them.
I didn’t think boxers could make such a difference, but wow – these are next level.
I put them on and instantly thought, ‘Why didn’t I find these sooner?' It’s crazy how soft and breathable they are – perfect for workouts or just chilling.
I wasn’t sure about bamboo fabric, but now I’m never going back. It’s incredible.
Very good quality! Just follow the size chart
Very soft breathable. It's like for a large size. Excellent delivery service. Excellent seller. Thank you.
it's ok, good running boxers, comfortable and good material. serious seller and fast shipping. thank you.
excellent quality and very comfortable
They’re so comfy I forgot I had them on – that’s how you know they’re great.
I never thought I’d rave about underwear, but here I am. These are that good!
I can’t get over how comfortable they are – it’s like magic!
nice size and in good condition
Lightweight fabric, very quick drying, recommended for 100%
Everything fine . Product seems ok after 1 week usage .
Very good quality be very satisfied with the purchase... I have almost in all colors
They hold up so well after washes – worth every penny!
Seriously the softest boxers I’ve ever owned – I’m obsessed!
These boxers stay soft even after multiple washes. Great for both lounging and light activity days.
The material feels incredibly soft and lightweight. I’ve already ordered more because they’re that good!
Perfect fit, no riding up!
I bought these after a recommendation, and they didn’t disappoint. They feel great during work and hold up well.
Durable and comfy, they’ve lasted longer than other brands I’ve tried. Perfect for both lounging and moderate exercise.
They hold up great for workouts, and they look good too.
Biofit boxers are really comfy. fit well, and these last ages. They’re great for moderate exercise or everyday wear!
Fit perfectly and feel comfortable all day – no complaints
I love how soft they feel all day. I wait until my boxers are really worn out to replace them, and these still feel great after months of use.
Saw an ad, tried them, now I’m hooked!
Keeps me cool during workouts, love the fit.
They’re so soft and great for moderate exercise. Plus, they don’t bunch up, which is a win for me.
I have bought these for my man. He said these are super soft and comfy all day.
I always buy my own underwear, and Biofit boxers are brilliant – so soft and comfortable all day. I do mostly light activities, and they’re perfect for that. Saw them advertised, and I’m glad I gave them a try.
These are the most comfortable and best looking boxers I have worn in a long time. And even better my wife loves how they look too 🥰 Will be ordering no other boxers from now on. 🥰🥰🥰
Very comfortable indeed
Bamboo material and all that is great but there is zero support! Fine if your nuts are peanuts but these boxers do not cut it if you’ve got big balls!
Had mine for a few weeks now and whilst they are nice and light they’re not as great as they’re made out to be. In this hot weather we’ve been having I’m still getting sweaty and clammy and can feel it…so the claims of keeping you feeling dry just aren’t accurate. I’m also still getting ride up which again, the website claims isn’t a thing. It’s a good job I got a buy 5 get 5 free offer and didn’t pay full price otherwise I’d be really annoyed and disappointed. Not bad but won’t buy again.
I took the plunge and purchased a pack of 10 in late May, they arrived a few weeks later. I stashed and relegated my old undies and committed to the Biofit. I had one pair that had missed part of the stitching, I asked Biofit, they sent me a replacement pair free of charge. I have to say, without doubt these are the most comfortable underwear I've ever had, it's been high temperatures and riding a motorbike, these a have been great. You cannot feel that you are wearing them. I'll be purchasing more for sure.
FAQs
How comfortable are they, really?
Comfortable enough that men bin every other pair they own within a week of trying them. Viscose from bamboo has no sharp fibres, it's naturally smooth against the skin, and soft in a way cotton never quite manages. The most common thing we hear is that you forget you're wearing them. That's the point.
What's the difference between viscose from bamboo and cotton?
Cotton holds heat and moisture against the skin. Viscose from bamboo pulls moisture away and lets air through. On a normal day you might not notice. On a warm day, after a workout, or after a long shift, you'll notice. Viscose from bamboo also holds its softness through washing in a way cotton doesn't, which is why durability is so much better.
How do I get the sizing right?
Our boxers are true to size — just order your usual. If you're between sizes, size up for a slightly more relaxed fit. Returning customer? Our sizing has been updated, so it's worth a quick look at the size guide before you reorder. Still unsure? Message us and we'll help you get it right.
What's the 180-day quality guarantee?
If anything goes wrong with the product in the first 180 days — quality issues, fabric problems, anything that shouldn't happen — we'll replace it or refund it. No hoops to jump through.
My wife/partner keeps wearing mine. Is this normal?
More common than you'd think. Viscose from bamboo is soft enough that it tends to cross boundaries. Our advice: order enough pairs that you can afford to lose a few.