Women's Long Sleeve Seamless Running Top | runderwear™ US – Runderwear.com

Women's Long Sleeve Seamless Running Top


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


  • 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

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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 our friendly team who would love to hear from you!

Email: hello@runderwear.com

runderwear shipping:

Shipping option


Carrier service

Delivery time

Free shipping – orders over $60


FedEx International Connect®

3-10 business days

Standard shipping - orders under $60


FedEx International Connect®

3-10 business days

runderwear returns:

We’re committed to you getting products that make you smile when you exercise! We’re happy to accept returns or exchanges on any unworn products for up to 30 days after you’ve purchased direct from our site. Our returns policy is extended to 60 days during November and December to cover holiday shopping and gifts. As our products generally come in to contact with some “sensitive areas” – we can’t accept returns on any underwear that has been tried on! To get started with a return or exchange, just click the link below – remember to include your order number beginning with # and details in the comments if you want an exchange.

start a return

If anything else about your order hasn’t left you feeling totally satisfied, just contact us here – we won’t sleep unless you’re 100% chafe-free, 100% comfortable and 100% happy!

Customer Reviews

Be the first to write a review
Breathable, Wickable and Chafe-Free - Trail Running Magazine
“Breathable, Wickable and Chafe-Free”
You will feel a million pounds - Womens Running
“You’ll feel a million pounds”
Best on Test Winner - 220 Triathlon Magazine
“Best on Test Winner”
Maximum comfort whilst you run - Personal Trainer Magazine
“Maximum comfort whilst you run”
Super comfy and sweat wicking - the guardian
“Super comfy and sweat wicking”