SUMS Reviews 

51
TrustScore 4.5 out of 5

4.7

While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more

To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more

Review summary

Created with AI, based on recent reviews

Looking at 48 reviews, reviewers overwhelmingly had a great experience with this company. Customers frequently praise the exceptional product quality, outstanding daily comfort, and reliable running performance, noting that these specialized socks effectively prevent blisters even during intense marathon distances. People also deeply appreciate the prompt delivery, highly efficient service, and vibrant, attractive design choices offered. Some reviewers were not happy with the initial sizing, mentioning that certain pairs felt a bit too tight or restrictive on their calves. A few consumers also noted occasional challenges regarding performance during extremely hot conditions or experienced minor technical hiccups with online features.

What people talk about most

Product

Customers consistently note positive experiences with product, highlighting that the running socks are... See more

Quality

Users describe positive interactions with quality, noting that the socks are durable, comfortable, and... See more

Order

Customers had positive experiences with order, highlighting the ease of the process and fast delivery.... See more

Reviews shaping this summary

Rated 5 out of 5 stars

I’ve been wearing SUMS for a few years now and will not run in anything else. Comfort, quality and excellent customer service put them head and shoulders above anyone else. Once you’ve run in a pair... See more

Rated 5 out of 5 stars

Have 7 pairs of Sums now, I’m a UK12 so ordered Large, first three pairs I ordered were great but a very neat fit. I ordered four more pairs recently, same size, much better fit! Particularly enjoying... See more

Rated 5 out of 5 stars

The Quarter Crew socks are brilliant—comfortable, durable, and perfect for any run. They stay put, feel great, and handle every distance effortlessly. Highly recommended.

Rated 5 out of 5 stars

First time ordering SUMS. Kept reading positive recommendations. Great ordering experience with order coming quickly. And so far after one run, really enjoying my new socks!


Company details

  1. Sportwear manufacturer
  2. Sportswear Shop

Written by the company

We're a specialty running sock brand out to see how far we can take the performance, sustainability and social-impact of running socks. Our sustainable recycled-nylon blend provides perfect anti-blister cushioning for trail, road or track running. Earn 5p per run when you connect your Strava account.


Contact info

4.7

Excellent

TrustScore 4.5 out of 5

51 reviews

5-star
4-star
3-star
2-star
1-star

No recent history of asking for reviews

This company hasn't invited customers recently, so reviews may not be representative

How this company uses Trustpilot

See how their reviews and ratings are sourced, scored, and moderated.

4.7

All reviews

(51)

51 reviews in the last 12 months

Write a review
Companies on Trustpilot aren't allowed to offer incentives or pay to hide reviews. Reviews are the opinions of individual users and not of Trustpilot. Read more

Rated 4 out of 5 stars

Great socks

Great socks, fairly pricey though. And the marketing strategy gets you, almost pressuring you to purchase the bundle deal for greater savings and free postage! Unfortunately, I pulled a muscle in my calf during my first run wearing the Sums ! Nothing to do with the socks; the socks are the most comfortable I’ve ever worn!

24 July 2026
Unprompted review
Rated 5 out of 5 stars

Sums socks

Sums socks are so comfortable, great material, high quality. I use them for all my runs. They stop me from getting blisters and they feel so light. I highly recommend.

8 July 2026
Unprompted review
Rated 5 out of 5 stars

Perfect gift for a runner

I bought 3 pairs of running socks as a gift for my daughter. Very quick delivery and a quality product. This is the second time I have gifted her sums socks and she is very happy with them.

11 July 2026
Unprompted review
Rated 4 out of 5 stars

Stylish and odour resistant, but too abrasive for me

I have given these three stars because they are not bad socks, but my experience has been very mixed.

They look great and work well for shorter runs or everyday wear. Their odour control is excellent, and even after long periods in them, my feet have never smelled particularly bad.

I also wore them for around 10 hours during a UTMB event in very wet conditions and did not develop any blisters, which genuinely impressed me. They handled the moisture well and protected my feet when soaked.

However, I have struggled with them during longer dry runs and hot weather. The material feels very thin, rough and abrasive against my skin rather than soft.

After a hours, they can begin to feel like sandpaper and have caused some of the worst rubbing and blisters I have experienced from running socks.

They are also extremely tight, difficult to get on and off, and the merino pair shrank after washing. My feet can feel hot and irritated in them, although that may simply be down to how they fit my feet rather than a problem everyone will experience.

Overall, they are stylish socks with excellent odour control and they performed surprisingly well in very wet conditions. For shorter runs, they could be a good option. Unfortunately, they have not worked well for my feet during longer, hotter or drier activities.

13 July 2026
Unprompted review
Rated 5 out of 5 stars

Cute & comfy running socks!

Bought my first pair at Francis Running shop in Lisbon and had to buy more online. They are so comfy during my runs and I get so many compliments on the fun designs!

8 July 2026
Unprompted review
Rated 5 out of 5 stars

Such a great find!

My instagram account mainly consists of independent shops, retailers who are new and trying to get their feet off the ground and SUMS was one of them. Best find, best socks - going to order more!

30 June 2026
Unprompted review
Rated 5 out of 5 stars

SUMS are the best

SUMS customer care is second to none as are their socks. Been looking round for ages for the best running socks, happy to say I have now found them ⭐️⭐️⭐️⭐️⭐️

19 June 2026
Unprompted review
Rated 5 out of 5 stars

Great socks

Great socks - I use them for running and hiking.
Wear well, wash well, good compression.
Only socks i would buy now for running and warm weather hiking.

22 June 2026
Unprompted review
Rated 5 out of 5 stars

Awesome socks!

Awesome socks! So good that I use them for running but also everyday too! Got the checkerboard pair and they are great socks. No blisters at all running!

I ordered x3 pairs in medium and 2 pairs arrived in the wrong size but Chloe from Customer Care replied super quickly and it was resolved very quickly too without any issues so big shout out to Chloe! Thank you!

15 June 2026
Unprompted review
Rated 5 out of 5 stars

Great comfort

Great comfort - no ruffling up during a 1/2 marathon.. best socks I have bought that caused no issues during a long run

12 June 2026
Unprompted review

The Trustpilot Experience

Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.

We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.

Learn about Trustpilot’s review process.

Here are 8 tips for writing great reviews.

Verification can help ensure real people are writing the reviews you read on Trustpilot.

Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.

Take a closer look