#EDIT005 Men’s Long Sleeve Base Layer

£65.00
Featuring all new fabrics, v2 of our bestselling Long Sleeve Base Layer can also be worn on its own in milder conditions, for any activity requiring high levels of comfort, breathability and moisture control.

Shipping January 2026

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THE BASE LAYER THAT ISN'T

Our Long Sleeve Base Layer is one of our own favourite products, and we aren't alone.

World Record-holding endurance cyclist, Alan Colville frequently trains and races in his in place of a jersey in milder conditions, and we know some customers run and even climb in theirs.

From #EDIT005 onwards we've sourced even softer, more performant recycled fabrics as well as taking on board some of your feedback asking for a closer fit around the neck.

However you choose to wear it, you'll be surprised at the warmth. But you'll marvel at how dry you stay, even when the intensity rises.

A LOAD OF WAFFLE

Whatever the weather conditions, a layer of fabric between your skin and your outer garment is critical in both moisture and temperature management. AKA comfort.

Natural fibres like Merino have their place, but when it comes to helping you stay dry - essential in colder weather - nothing comes close to the performance of synthetic fibres.
 
Our v1 Long Sleeve Base Layer fabric was perfectly good. But at Kostüme we strive for more than just good. Which is why as soon as we saw the new fabrics, there wasn't much of a decision to be made.

When you can see the quality of a fabric in pictures, you know how good it's really going to be in person.

We've also found the performance to be an improvement, with a slightly more open weave managing to stay warmer but especially dryer than before.

POCKET DIALLED

You may have noticed we like a pocket or two. But it's never a box-ticking exercise.

With the dual-purpose nature of our Long Sleeve Base Layer, it made perfect sense to add a discreet rear pocket for your phone, keys or credit card, allowing you extra flexibility in your layering decisions.

Finally, details like our super-soft close-fit cuffs (which help to stop the sleeves riding up when pulling on an outer layer) plus flatlock seams throughout makes for arguably the best value product in our range.

KEY FEATURES

  • Dual use - wear on its own or as part of a layering system
  • OEKO-TEX® certified recycled fabrics made from pre-and-post consumer plastic waste
  • UPF15/UPF50 protection
  • Exceptionally breathable, lightweight and fast-drying
  • Discreet rear phone pocket
  • Close-fitting cuffs for performance and comfort
  • Flatlock seams to avoid irritation
  • Tailored neck
  • Gripper-free design
  • Sublimation printed - no harmful dyes
  • Made in Romania
  • Product weight: 100g (small)

THE BASE LAYER THAT ISN'T

Our Long Sleeve Base Layer is one of our own favourite products, and we aren't alone.

World Record-holding endurance cyclist, Alan Colville frequently trains and races in his in place of a jersey in milder conditions, and we know some customers run and even climb in theirs.

From #EDIT005 onwards we've sourced even softer, more performant recycled fabrics as well as taking on board some of your feedback asking for a closer fit around the neck.

However you choose to wear it, you'll be surprised at the warmth. But you'll marvel at how dry you stay, even when the intensity rises.

A LOAD OF WAFFLE

Whatever the weather conditions, a layer of fabric between your skin and your outer garment is critical in both moisture and temperature management. AKA comfort.

Natural fibres like Merino have their place, but when it comes to helping you stay dry - essential in colder weather - nothing comes close to the performance of synthetic fibres.
 
Our v1 Long Sleeve Base Layer fabric was perfectly good. But at Kostüme we strive for more than just good. Which is why as soon as we saw the new fabrics, there wasn't much of a decision to be made.

When you can see the quality of a fabric in pictures, you know how good it's really going to be in person.

We've also found the performance to be an improvement, with a slightly more open weave managing to stay warmer but especially dryer than before.

POCKET DIALLED

You may have noticed we like a pocket or two. But it's never a box-ticking exercise.

With the dual-purpose nature of our Long Sleeve Base Layer, it made perfect sense to add a discreet rear pocket for your phone, keys or credit card, allowing you extra flexibility in your layering decisions.

Finally, details like our super-soft close-fit cuffs (which help to stop the sleeves riding up when pulling on an outer layer) plus flatlock seams throughout makes for arguably the best value product in our range.

KEY FEATURES

  • Dual use - wear on its own or as part of a layering system
  • OEKO-TEX® certified recycled fabrics made from pre-and-post consumer plastic waste
  • UPF15/UPF50 protection
  • Exceptionally breathable, lightweight and fast-drying
  • Discreet rear phone pocket
  • Close-fitting cuffs for performance and comfort
  • Flatlock seams to avoid irritation
  • Tailored neck
  • Gripper-free design
  • Sublimation printed - no harmful dyes
  • Made in Romania
  • Product weight: 100g (small)
Dual use - wear on its own or as part of a layering system

OEKO-TEX® certified recycled fabrics made from pre-and-post consumer plastic waste

UPF15/UPF50 protection

Exceptionally breathable, lightweight and fast-drying

Discreet rear phone pocket

Close-fitting cuffs for performance and comfort

Flatlock seams to avoid irritation

Tailored neck

Gripper-free design

Sublimation printed - no harmful dyes

Made in Romania

Product weight: 100g (small)

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