On paper, the Gobik Cell Skin base layer ticks all the boxes. It ditches the typical t-shirt design idea for a panelled construction that wouldn’t look out of place in an Avengers movie, and the panels work well. Unfortunately the many seams between them don’t.

The majority of these panels are Polartec Delta, a fabric which uses small hexagonal ‘cells’ to move sweat from the skin and leave gaps through which air can flow, accelerating evaporative cooling and keeping you cool on warm rides.

And it works. On a huge huff up one of Bath’s bigger hills (Pennyquick, if you’re local) with a stack of lorries behind me and my heart rate all the way into zone five, I certainly started feeling the heat, but it never became overbearing. And unzipping my jersey – even just a tiny bit – resulted in a cooling sensation like I was being hugged by Jack Frost.

2026-Gobik-Cell-Skin-Grey-Black-collar.jpg
2026-Gobik-Cell-Skin-Grey-Black-collar.jpg (Image Credit: Farrelly Atkinson)

It also looks great… not that you’ll see much of it beyond the cleavage logo, unless you’re feeling brave enough to bare your Delta-clad torso or you’re on the turbo, away from prying eyes. If you’re not keen on this ‘Greyblack’ colour, it’s available in Hakuba. Which you may know as white.

I’m not sure if this garment is 100% Delta fabric. There are two panels, one down the spine and one just beneath the belly button, that feature a different kind of material. This has a more open, traditional base layer weave, and presumably these are employed to channel cooler air into the Delta regions.

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2026-Gobik-Cell-Skin-Grey-Black-detail.jpg (Image Credit: Farrelly Atkinson)

This is also where the Cell Skin’s biggest flaw becomes apparent: this panels are stitched together with numerous seams. Despite Gobik’s boasts of flatlock stitching, most aren’t actually flat, and they can dig in a bit. What’s worse is that once you get sweaty, these seams become sodden (eww!), so moisture is held close to your skin. That can become uncomfortable.

2026-Gobik-Cell-Skin-Grey-Black-chest.jpg
2026-Gobik-Cell-Skin-Grey-Black-chest.jpg (Image Credit: Farrelly Atkinson)

This clammy moistness only builds up when you’re really sweaty, but it’s noticeable and annoying. It also means you can’t use its premium ‘temperature regulation’ abilities through a whole summer. Even UK summer days can get warmer than 25°C, which is the highest temperature Gobik recommends this for.

2026-Gobik-Cell-Skin-Grey-Black-back.jpg
2026-Gobik-Cell-Skin-Grey-Black-back.jpg (Image Credit: Farrelly Atkinson)

This isn’t a problem I’ve had with other base layers, and it certainly made me realise why ‘seamless’ is such a desirable feature.

Value

Base layers range from £20ish to £125 for thermal editions (or £5 for a string vest), and Gobik’s Cell Skin sits somewhere in the middle of that.

Galibier’s Echelon SS base layer is pretty much half the price at £23, and it has fewer seams. It looks good and does its job, even if it does have quite a roomy fit and feel a bit plasticky against the skin.

Moving up the ladder you’ll find the likes of the Altura Tempo Seamless SS base at £40. Despite Altura marketing this one as ‘seamless’ it has seams (why don’t these people understand seams!?), but it still performs impressively.

At £55, Castelli’s Pro Mesh 2.0 base layer is pricier again, but has a great fit and is the best option if you want to splash out on a premium garment. The only negative is that the sleeves can roll themselves up.

Overall

This looks great, is well put together and features some very impressive fabrics, but its many seams are its downfall – once drenched with sweat they undermine all the good work of the rest.

Test Report

What does the manufacturer say about this product?:

Gobik says: “Polartec Delta fabric is a true revolution in breathability and temperature regulation, working more efficiently than second-skin fabrics. Thanks to a hexagonal structure that raises the points of contact with the skin, the interior air flow is increased, with a faster dispersion of moisture on its surface and less adherence.”

Tell us some more about the technical aspects of this product:

Gobik lists:

Hexagonal structure that raises the points of contact with the skin.
Fast moisture dispersion and less adherence.
Flat seams and light weight.
Wide collar that won’t bother or chafe.
Fit that adapts to the rider’s anatomy and promotes movement on the bike.

Rate the product overall for quality (1-10):
8/10

Any further comments on quality?:

This feels well-constructed, with strong material and reinforced seams.

Rate the product for performance when used for its designed purpose (1-10):
6/10

Any further comments on performance?:

The Cell Skin base layer certainly lives up to Gobik’s claims of keeping you cool on warm days, but the seams can become waterlogged.

Rate the product for value (1-10):
4/10

How does the price compare to that of similar products in the market, including ones recently tested?:

At £45, this is in the upper region of base layer pricing, coming in at a similar level to the Castelli Pro Mesh 2.0 (£54) and the Altura Tempo (£40).

Rate the product for weight:
8/10

Any further comments on weight?:

At 88g (L/XL), it is fairly light, and unnoticeable if you need to remove it.

Rate the product for comfort:
6/10

Any further comments on comfort?:

Despite its polyester chainmail construction, the fabric never feels scratchy against the skin. But once those seams get sweatlogged, it can get uncomfortable.

Rate the product for fit:
9/10

Any further comments on fit?:

It’s a skintight fit. It does come up a bit short at the front, but on the bike it doesn’t matter.

Any comments on sizing? Did it size up too big or too small?:

The L/XL size for me (192cm, 90kg) felt just about right, and there’s enough give in the material to accommodate all shapes and sizes.

Any issues with durability?:

The Polartec Delta fabric feels solid, but it’s bunching in places after a couple of washes.

How easy is the product to care for? How did it respond to being washed?:

I washed it a couple of times without issue. The thin fabric means it’s probably a good idea to stick it in a laundry bag when you wash it, though.

Did you enjoy using the product? Yes

Would you consider buying the product? No

Would you recommend the product to a friend? No

Use this box to explain your overall score

The high-tech fabric is great, but the implementation is bewildering. It’s hard to recommend when more comfortable designs with fewer seams can be had for half the price.

Overall rating: 5/10

About the tester

Age: 45Height: 193cmWeight: 88kg

I usually ride: Tritao GroontMy best bike is:

I’ve been riding for: Over 20 yearsI ride: Every dayI would class myself as: Expert

I regularly do the following types of riding: Road racing, Gravel riding, Indoor riding, Indoor racing, Bikepacking, Commuting, Audax, Fitness riding, Leisure riding