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Shimano S-Phyre Winter Baselayer



Brilliant wicking and perfect fit but it's very expensive

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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Shimano's S-Phyre Winter Baselayer is a brilliant layer that can cope with both cold and mild conditions. It's soft, with a great fit. But the price is very high compared with equally excellent rivals.

  • Pros: Brilliant wicking, perfect fit, very robust
  • Cons: Expensive

The new range of Shimano S-Phyre clothing is certainly at the premium end of the spectrum. At £69.99, the baselayer is almost, but not quite, the most expensive baselayer we've tested on Brands such as Craft, dhb, Rapha and Altura are all producing brilliant but cheaper baselayers, some for a fraction of the S-Phyre's price.

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That said, this is a seriously good piece of kit. It has great features, like the venting on the spine, and the fit is excellent.

Shimano S-Phyre Winter Baselayer - back.jpg

That venting comes in the form of a mesh back panel that looks like a honeycomb structure. It certainly works: I never found myself feeling that 'cold, damp back' sensation that usually comes at the cafe stop. It's certainly pleasant to remain comfortable, even after hard training efforts.

There is also venting under the arms, which not only helps regulate body temperature it also seems to regulate body odours too. The baselayer hasn't developed any foul smells, even after two months of heavy use.

Shimano S-Phyre Winter Baselayer - under arm vent.jpg

Fit is also very good, with a close but unrestrictive cut and very little stitching. Shimano has used its anatomic 3D construction to reduce stitching to a minimum, and I have to say, I haven't noticed any.

Be aware that the sizing is decidedly small. I usually wear a small but I fitted this medium perfectly. If you've not got the body of a racing snake, size up by at least one size.

The sleeves are well proportioned with the cuffs sitting right on the wrist. The stretch in the fabric means my chest was unrestricted and the fit across the shoulders is close but comfortable.

The neckline is low, which may put some people off, but I prefer this cut as I can then wear it with a skinsuit for cyclo-cross, then layer with a good snood for training rides. The hem of the main body sits relatively high. This prevents any bunching of fabric at the lower abdomen, which can irritate skin and also leave a visible bunching line beneath your shorts.

Shimano S-Phyre Winter Baselayer - detail.jpg

I'm pleased to report that while the price is high, the baselayer is lasting well. I've used this for cyclo-cross races, caking it in mud, crashing and pressure washing it clean before it's allowed in the washing machine. It's survived everything and still kept its soft feel against the skin.

It does have a whole host of rivals, and many are heavily discounted. The Craft Active Extreme 2.0 baselayer got a great review and is currently only £20 on Wiggle.

> Buyer's Guide: 15 of the best cycling baselayers

A better option for deep winter when the temperature drops below zero is the Rapha Merino Baselayer LS. This is warmer for steady rides but it does struggle at higher intensities. At £65, it's only a fiver cheaper than the S-Phyre, though they are quite a regular feature in the sale section.

The S-Phyre is brilliant, but until it comes down in price I couldn't really recommend it for the average rider. If you need a baselayer for cyclo-cross racing, that's a different matter; the fit under a skinsuit makes it nigh-on perfect.


Brilliant wicking and perfect fit but it's very expensive

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Make and model: Shimano S-Phyre Winter Baselayer

Size tested: Medium

Tell us what the product is for

From Shimano:

"A critical tool for cool to cold weather riding, the S-PHYRE Winter Baselayer is the perfect starting point for a layering system that helps deliver maximum power and control. The S-PHYRE Winter Baselayer utilizes 37°C Temperature Regulation technologies with Anatomic 3D construction to assist the rider in maintaining optimal body temperature in cold-weather conditions across a wide range of exercise intensity levels."

I'd agree with the temperature aims. The temperature regulation is ideal for harder efforts on cold days, but there are better options for cold, steady riding. The venting and wicking really do work.

"Anatomic 3D design integrates dual-surface, seamless engineered-knit technology with an integrated mesh back vent panel allows excess body heat to escape for optimal temperature regulation."

The construction gives a very close and comfortable fit and the minimal stitching isn't noticeable.

Tell us some more about the technical aspects of the product?








36% Polypropylene, 57% Polyester, 7% Spandex



Rate the product for quality of construction:

The 3D construction and lack of seams result in zero irritation. The venting panel on the back is also well made and shows no signs of wear.

Rate the product for performance:

It's ideal for hard efforts, keeping me very comfortable through many different types of riding.

Rate the product for durability:

Anything that survives training, cyclo-cross races, cyclo-cross crashes and pressure washing and then retains its soft feel and fit is excellent in my opinion.

Rate the product for fit:

Perfect for me while racing, but some will want a longer torso and possibly a higher neck.

Rate the product for sizing:

These come up small. They're designed for racers with tiny upper bodies so this medium fitted me well when I'd usually wear a small.

Rate the product for weight:

Exactly what I'd expect for a mid-weight winter baselayer.

Rate the product for comfort:

The wicking and fit are noticeable for all the right reasons.

Rate the product for value:

This is certainly a premium product; we've reviewed more expensive ones, but they're few and far between.

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

Super-simple: pressure wash if I've been sliding around in the mud, then washed on 40°C and tumble dried on cool. No signs of abuse.

Tell us how the product performed overall when used for its designed purpose

Really well. I was left dry and comfortable after hard 3hr training rides at tempo. I'd usually get to the cafe and be clammy. Not with this.

Tell us what you particularly liked about the product

The performance for racing is amazing. It kept me comfortable and fitted really well under my skinsuit.

Tell us what you particularly disliked about the product

The price is just so high.

Did you enjoy using the product? Yes, I found myself reaching for it before every ride.

Would you consider buying the product? No, I'd go with the Craft at under a third of the price.

Would you recommend the product to a friend? Yes, but only if they needed the best baselayer for winter racing.

Use this box to explain your overall score

It's brilliant, but unless you're racing in the winter or have deep pockets the price is a big drawback.

Overall rating: 8/10

About the tester

Age: 22  Height: 177cm  Weight: 64kg

I usually ride: Cannondale Supersix Di2  My best bike is:

I've been riding for: 5-10 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: road racing, time trialling, cyclo-cross, commuting, club rides, general fitness riding, I specialise in the Cafe Ride!

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