Women's Running Base Layer | Runderwear™ – Runderwear.com

Women's Running Base Layer


Base layer. Built differently. The Women's Long Sleeve Running Base Layer is designed with comfort and performance in mind. Run warm in the coldest of climates without overheating.

  • Chafe-free running, guaranteed
  • Hand-warming mitts, convenience at your fingertips
  • Dynamic heat control, run warm without overheating
  • Flexible fit, super-soft comfort on its own or under a top
  • Seamless design, no side seams or labels and reduced waste
  • Moisture-wicking, removes sweat from your skin quickly

Color: Black

  • Black
  • Blue
  • Pink


  • Select Size
  • S
  • M
  • L
  • XL
Two Women Running In Coastal Setting In Runderwear Base Layers Pink Blue

Hand-Warming Mitts

Enjoy convenience at your fingertips to provide extra warmth whenever you need it. The innovative, built-in mitts are easy to roll over your hands in cold weather and simply roll off once you've warmed up.

Dynamic Heat Control

The lightweight, breathable fabric helps optimise your body temperature in any conditions. Carefully positioned micro-perforations improve airflow to your body, so you can run warm without worrying about overheating.

Flexible Fit

Experience ultimate comfort whilst you run thanks to the super-soft, stretchy fabric that doesn't compress to your body like the common base layer. This slightly looser fit, combined with the a longer body, means you have the flexibility of wearing it on its own or under another top.

2 Women Running Through Woods Wearing Runderwear Base Layers in Pink and Blue

Seamless Design

The base layer is designed using 360° seamless technology, meaning there are no side seams or labels - reducing the risk of rubbing or irritation. It also means a significant reduction in wastage during the production process vs the traditional cut and sew method.

Woman Running In Quarry In Runderwear Black Base Layer


The technical fabric construction is designed to move with your body and has excellent moisture-wicking properties. This will remove sweat from your skin quickly to keep you dry and focused on delivering your best performance.

Woman In Forest In Pink Runderwear Base Layer

Customer Reviews

No reviews yet

Experience ultimate comfort and convenience with the Women’s Long Sleeve Running Base Layer and run chafe-free, guaranteed. The innovate hand-warming mitts are perfect for the start of a cold run and can be rolled off with ease once you’ve warmed up. Dynamic heat control means that your body will stay at the optimum temperature during your run, no matter what the conditions. A flexible fit allows the Base Layer can be worn on its own or under another layer, whilst the moisture-wicking fabric removes sweat from your skin quickly to keep you dry and comfortable. The seamless design offers reduced rubbing or irritation thanks to no side seams or labels, not to mention a significant reduction in wastage during production

Fabric Composition:

92% Polyamide
8% Elastane

Product Care:

  • Warm machine wash up to 105°F (40°C)
  • Wash with similar colours
  • Do not tumble dry
  • Do not soak, bleach or dry clean

Runderwear Help and Advice:

If you need any help or advice, you can contact Team Runderwear, we would love to hear from you!

Email: hello@runderwear.com

Runderwear Shipping:

We aim to ship the majority of our US orders from our warehouse in Millboro, VA. In the rare circumstance that we are unable to fulfil your order from our US warehouse, then we will dispatch your order from our UK warehouse on a tracked service at no extra cost. This should take 7-10 business days to arrive.

US Delivery

Delivery Option


Carrier Service

Delivery Time

Free Shipping – Orders over $60


US Postal Service - 1st Class Tracked

3-6 business days

Standard Shipping - Orders under  $60


US Postal Service - 1st Class Tracked

3-6 business days

Runderwear Returns:

You can return any Runderwear socks, crop tops, support bras, base layers or headwear to us within 30 days of purchase and can request a full refund or a product exchange.

Due to hygiene reasons we can not accept returns on underwear including briefs, hipsters, g-strings, hot pants, boxer shorts and triathlon suits, if they have been worn.

In the unlikely event that your product becomes faulty, you may return your purchase for a full refund or exchange.

Please package your return appropriately and add in a note to let us know whether you require a refund or product exchange. Please pay the postage in full and send to us at the following address:

Runderwear Returns
i-Fulfilment | RUNDERWEAR, Virginia Warehouse, 223 Millboro Industrial Pk Rd, Millboro, VA 24460, USA

Please email Team Runderwear at hello@runderwear.com if you require any further help.

Customer Reviews

No reviews yet
Sore no more - Sport
“Sore no more”
Maintain their shape after repeated washing - excellent
“Maintain their shape after repeated washing - excellent”
Moisture wicking, lightweight, temperature control - Running Fitness
“Moisture wicking, lightweight, temperature control”
Breathable, Wickable and Chafe-Free - Trail Running Magazine
“Breathable, Wickable and Chafe-Free”
The best Christmas Gift for runners - Runners World
“The best Christmas gift for runners"