Performance Crew Running Socks: Mono
Performance Crew Running Socks: Mono
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Order before 3pm and it ships today, UK delivery within 48 hours. Free delivery on your first order, £4.99 after that.
£10 a pair when you buy two or more, one in the wash, one in the bag, one on your feet.
The pair you stop thinking about.
Mono is the training sock, the one that goes with every kit you own, survives four washes a week and doesn't announce itself at the start line. Built to the same spec as the rest of the range, just quieter about it.
A 60% nylon body holds shape through repeated washes, with 5% elastane keeping the compression honest session after session, and cushioning placed where feet blister first.
- Targeted compression through the arch and ankle, support where it counts, without the tourniquet feel of a full compression sock.
- Cushioned heel and toe box the two failure points once the distance stacks up.
- Ventilation panels across the top of the foot, so heat leaves before it becomes friction.
- Zero-slip arch band stays put through sled pushes, transitions and the last 10k. No bunching at the heel.
- 20cm crew height with a 3cm ribbed cuff sits clear of the shoe collar, covers the lower calf, and stays where you put it.
Composition: 60% nylon, 20% polyester, 15% cotton, 5% elastane. Nylon-led for durability and shape retention, with a touch of cotton for softness next to the skin.
Worn by runners, triathletes and Hyrox athletes on start lines across South Wales.
Sizing
One size, UK 4–13. The compression knit stretches across the full range, a standard fit at the smaller end, closer-fitting at the larger.
Still a proper compression fit at a size 13. Most one-size socks stop at 11, and the ones that don't tend to give up the compression somewhere around a 12. These hold it to the top of the range, so if you've spent years sizing out of "one size fits all", start here.
Garment measurements, laid flat and unstretched: foot length 18cm, sock height 20cm.
Specification
| Composition | 60% nylon, 20% polyester, 15% cotton, 5% elastane |
| Size | One size, UK 4–13 |
| Sock height | 20cm (crew) |
| Cuff | 3cm ribbed |
| Foot length | 18cm laid flat, unstretched |
| Cushioning | Heel and toe box |
| Compression zones | Arch and ankle |
| Colour | Mono |
| Care | Machine wash at 40° with similar colours. Do not tumble dry. |
Also in
White · Green · Orange · Pink or take three pairs and rotate them.
Custom club socks
Running the same design across a club or team? Custom socks in your colours start from 50 pairs per design, with better pricing from 100, and since these are one size, there's no splitting an order across a size run.
Message us on WhatsApp with your colours, logo and numbers, and we'll come back with a price and a lead time for your season.
Order before 3pm and it ships the same working day, arriving within 48 hours. Free delivery on your first order, £4.99 after that. £10 a pair when you buy two or more.
What shoe sizes do these fit?
What shoe sizes do these fit?
One size, UK 4–13. Laid flat and unstretched the foot measures 18cm and the sock stands 20cm tall; the compression knit stretches across the full range, and stays a proper compression fit right up to a size 13.
Will they slip down mid-run?
Will they slip down mid-run?
The arch band holds position through a full marathon without bunching at the heel, and the 3cm ribbed cuff keeps the crew height from rolling down the calf.
What are they made of?
What are they made of?
60% nylon, 20% polyester, 15% cotton, 5% elastane. Nylon-led for durability and shape retention, with a touch of cotton for softness next to the skin.
How do I wash them?
How do I wash them?
Machine wash at 40° with similar colours. Don't tumble dry — heat is what kills the elastane, and the compression with it.
When will they arrive?
When will they arrive?
Order before 3pm on a working day and they ship the same day, arriving within 48 hours. Your first order ships free; after that UK delivery is £4.99.
Can I get these in club colours?
Can I get these in club colours?
Yes — custom socks in your colours start from 50 pairs per design, with better pricing from 100. Since these are one size, there's no splitting an order across a size run. Message us on WhatsApp with your colours, logo and numbers.
Bought the socks for IM Wales. Didn’t disappoint, really comfortable, no blisters and feet felt great throughout. They helped massively in me achieving a marathon time I’m proud of. Highly recommended!
Used these socks for Ironman Wales 2025 and they are still my ‘go to’ socks for my longer runs.
Need to get some fresh ones for the 2026 season!
Excellent product , will be buying more!
Socks are great quality and very comfortable. Not worn them during competition yet so can't comment on their durability there.
Comfortable, supportive where needed. Have done plenty of runs and cycles in these socks and have had no blisters or hot spots. Colour hasn't faded either after multiple washes.
Very comfortable overall and I love the design. I do find them tight on my ankle and after an hour they really dug in. So see how they go after a couple of washes.
Purchased these clubs socks and they’re brilliant - comfy and no blisters after long runs which is always a bonus and they look great!!
Super comfy and no blisters or movement on the socks. Can’t wait to see the new designs, will definitely be purchasing.
Six months in and these socks are still high-quality. No blisters and very comfortable—highly recommended!
Really happy with the socks, fit and feel top quality. Lool great as well
I’ve tried quite a few running socks over the years and these honestly surprised me. They’re noticeably more comfortable than my usual Hoka running socks. The material feels really soft but still supportive, and they stay in place without rubbing or bunching up during longer runs. My feet stayed cool and dry even on harder sessions. Small detail, but they also fit really well around the arch which makes them feel secure in the shoe.
Overall, really impressed with them – definitely becoming my go-to running socks.
Absolutely love these socks, comfy, stylish and never had a blister during my runs. Top quality by IS3
Best socks
Very nice fit, comfy with the padding in the right places, highly recommend
Great quality, comfy on long runs!
Finally, a sock that actually stays in place!
I’ve been using the IS3 Teamwear TeamGJE socks for a few weeks now, and the difference in comfort is massive. The first thing I noticed was the compression around the arch. I usually struggle with socks not sitting right but these stayed perfectly in place for the whole run. The extra cushioning on the heel is a lifesaver for preventing blisters, too. Definitely my new go-to training and racing in.
Outstanding product. High end material. Perfect for all runs from 5km to Marathons
These socks not only look top class but feel amazing too. Highly recommended
Lovely socks great product
Lovely socks. Great quality