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Features +

Features:

  • Lightweight construction - reinforced lightweight mesh construction allows for greater breathability, airflow and stretch, whilst keeping strong and durable.
  • 4-way stretch - unlike other materials, this can stretch in 4 ways at the same time... meaning this will perfectly match the shape of your body.
  • Taped neck and armholes - we reinforce our super lightweight base layers at the neck, arms and body to achieve a more durable product.
  • Fast wicking & drying - drawing moisture away from the body and dispersing it out onto the top layer for quicker evaporation times, helping your body feel fresh and stay at the right temperature.
  • Super breathable - lightweight in construction allows plenty of air to come in and the quality of the weave allows hot air and moisture to come out quickly. This makes our base layers amazing to use all year round.
  • Sleeveless - sleeve within a sleeve.... no thank you. Our base layer is sleeveless so you don't have the annoyance of a sleeve in a sleeve. This makes our base layer compatible with any over layer.
  • Women's specific fit - because men's and women's bodies are different.
Size chart +
Size Chest CM
XS 75-81
S 81-86
M 86-92
L 92-97
XL 97-102
XXL 102-111
XXXL 111-117

View the full size guide →

Women's Jefferson Ibex Base Layer.

5.0 (28)
Size Size guide

Size sold out? Tap it and we’ll email you when it’s back.

This product is currently out of stock and unavailable.

Free UK delivery on orders over £50

SKU AC2419P

  • ○Currently out of stock
  • ✓90-day return policy
  • ✓Designed in the U.K.

Weather & fit.

Temperature

12–22°C

Conditions

Dry

Fit

Regular

Lightweight and versatile for ride all day comfort. Perfect for everyday adventures.

Herd voices.

5.0
28 reviews of the Women’s Ibex Mesh Base Layer, across all designs
5 out of 5 stars

I love this garment, both under a jersey or on its own on a hot day. I’d love to see a vest with back pockets from SG, that would be a great addition to the collection

Heather B. · Aug 2026

Reviewed on: Womens Socket Shadow Mesh Base Layer

5 out of 5 stars

Base layers have been a game changer for me! Brilliant.

Zoe N. · Apr 2026

Reviewed on: Women’s Hofmann Ibex Base Layer

5 out of 5 stars

Great base layer, had to replace it for my other size and as ever SG were helpful and efficient

Serena A. · Mar 2026

Reviewed on: Women’s Vulcan White Ibex Bodyline Base Layer

Read 25 more reviews
5 out of 5 stars

Great pattern and excellent return to get the right size for me

Serena A. · Mar 2026

Reviewed on: Women’s Kubrik Ibex Bodyline Base Layer

5 out of 5 stars

Cannot believe I took this long to get a stolen goat base layer - no sleeves works so much better. Great pattern

Serena A. · Mar 2026

Reviewed on: Women’s Hofmann Ibex Base Layer

5 out of 5 stars

Genius! It is brilliant in the heat as well as colder days. Worth the money - I have two tops now!

Laura J. · Sep 2024

Reviewed on: Women’s Race Team Ibex Bodyline Base Layer

5 out of 5 stars

Can’t beat a good base layer. Comfortable and does the job

Verified buyer · Mar 2024

Reviewed on: Women’s Troupe Ibex Bodyline Base Layer

5 out of 5 stars

I find a baselayer essential throughout the whole year and this is a great summer one. It's light and breathable and is a perfect match for the vulcan white ibex jersey

Verified buyer · Mar 2024

Reviewed on: Women’s Vulcan White Ibex Bodyline Base Layer

5 out of 5 stars

Such a great idea! Perfect to add under jerseys for a bit of extra warmth, or for training indoors.

Zoe N. · Oct 2023

Reviewed on: Women’s Polka Multi Ibex Bodyline Base Layer

5 out of 5 stars

I have a few baselayers, but this has been my absolute favorite. I love the colors and deisign... and it is light and airy. Really helps keep you dry in a range of temps (including a day that went from 7 to 28 over the course of the ride. Love, love, love it.

Sarah W. · Apr 2023

Reviewed on: Women’s Norton White Ibex Bodyline Base Layer

5 out of 5 stars

Whilst it seems too thin it’s a great base layer. Have 2 now, definitely worth having.

Jacqui G. · Sep 2022

Reviewed on: Women’s Polka Multi Ibex Bodyline Base Layer

5 out of 5 stars

Perfect on its own for indoors on the turbo, or under a jersey outdoors. Length is a little long for tucking into bibs, but perfect for over baggy or bibless shorts. I have two and will definitely buy more in the future.

Catherine B. · Aug 2022

Reviewed on: Womens Tapioca Base Layer

5 out of 5 stars

Love the funky colours of this baselayer. Nice and long. A close fit but with stretch. Comfy. I wear a baselayer all year round. The sweat wicks away keeping my temperature even.

Verified buyer · Jul 2022

Reviewed on: Womens Predator Base Layer

5 out of 5 stars

Great fit under your bib shorts. It’s all about layering and this vest is perfect.

Tracey S. · Jul 2022

Reviewed on: Women’s Polka Multi Ibex Bodyline Base Layer

5 out of 5 stars

Perfect baselayer in terms of fit and comfort. Looks great too.

Verified buyer · Jul 2022

Reviewed on: Women’s Race Team Ibex Bodyline Base Layer

5 out of 5 stars

Why did I take so long to buy one?! This is a great bit of clothing, really comfortable and if an extra layer is needed this is it!

Juliet G. · Jul 2022

Reviewed on: Women’s Polka Multi Ibex Bodyline Base Layer

4 out of 5 stars

Great base layer in a fab colour. Only dropped a star because it's quite long in the body so when I tuck it into my shorts it sits around my hips. A couple of inches shorter and it would be perfect.

Rachel W. · Jul 2022

Reviewed on: Womens Tapioca Base Layer

5 out of 5 stars

Love the breathability and comfort of these base layers, I was so impressed I’ve bought three!

Chrkemp · Jul 2022

Reviewed on: Women’s Polka Multi Ibex Bodyline Base Layer

5 out of 5 stars

Love the breathability and comfort of these base layers, I was so impressed I’ve bought three! Great designs too

Chrkemp · Jul 2022

Reviewed on: Women’s Race Team Ibex Bodyline Base Layer

5 out of 5 stars

Love the breathability and comfort of these base layers, I was so impressed I've bought three!

Chrkemp · Jul 2022

Reviewed on: Women’s White Ibex Bodyline Base Layer

5 out of 5 stars

Great product just runs a little big so order a size smaller

Verified buyer · Jul 2022

Reviewed on: Womens Voltage Base Layer

5 out of 5 stars

I didn't understand how an extra layer can keep you cooler but then I bought a base layer. I still don't understand how, but it works! As with all SG kit the fit is perfect and a great design too!

Charlotte L. · Jul 2022

Reviewed on: Women’s Race Team Ibex Bodyline Base Layer

5 out of 5 stars

Possibly the best design for a baselayer & named after Graham Norton’s opening credits. What more could you want?

Helen · Jul 2022

Reviewed on: Women’s Norton White Ibex Bodyline Base Layer

5 out of 5 stars

Great fit - plenty of length and looks great. Of course it wicks brilliantly as well. Really pleased with this vest.

Sarah M. · Jul 2022

Reviewed on: Women’s Troupe Ibex Bodyline Base Layer

5 out of 5 stars

Keeps you warm in cooler weather and is brilliant for on the indoor trainer on its own under bibs. Fit is great and usual good quality. Don’t know why I haven’t had one before!!!

Sarah M. · Jul 2022

Reviewed on: Womens Predator Base Layer

5 out of 5 stars

Fabulous fabric, sweat wicking & so soft. Great length & doesn’t move.

Helen · Jul 2022

Reviewed on: Women’s Troupe Ibex Bodyline Base Layer

5 out of 5 stars

Perfect layered under a jersey or jacket, or even worn on it's own on the turbo. Really like the sleeveless cut.

Helen C. · Jul 2022

Reviewed on: Womens Voltage Base Layer

5 out of 5 stars

Stolen Goat base layers are the best. The perfect length and fit, the fabric is sweat wicking and stretchy. No need for dull baselayers :)

Helen · Jul 2022

Reviewed on: Women’s Race Team Ibex Bodyline Base Layer

Stolen Goat as a shop: rated 4.9 out of 5 from 7,820 reviews on Reviews.co.uk. Read shop reviews

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Women’s Ibex Mesh Base Layer

Size guide

Size Chest CM
XS 75-81
S 81-86
M 86-92
L 92-97
XL 97-102
XXL 102-111
XXXL 111-117

Body measurements. Measure yourself, not a garment you already own, and match the size to your chest (tops) or waist and hips (bottoms).

Full size guide, every garment