Lightweight merino longsleeve with a relaxed athletic fit and raglan sleeve construction for unrestricted movement. Naturally breathable and temperature regulating. Built for year-round running.

Pace_System
Built for daily training, steady efforts, and consistent mileage. Designed to balance comfort, storage, and durability across a wide range of conditions.

Product intensity

Product Intensity 3

[ Specs ]

[ 1 ] Ultralight Merino Wool

[ 2 ] Raglan Sleeve Construction

[ 3 ] Flatlock Seams

[ 4 ] Relaxed Athletic Fit

INNER SELF Lightweight Merino Running LS in black — close-up detail INNER SELF Lightweight Merino Running LS in black — close-up detail
MerinoBalance™
A lightweight merino wool blend designed for year-round running and variable conditions.

Temperature Range: -5°C to 20°C

Température Celsius Température Fahrenheit

Weight: 140 GSM — Lightweight

[ Specs ]

Thermoregulation: Natural temperature control across conditions

Moisture Management: Wicks moisture while remaining comfortable

Odor Resistance: Naturally antimicrobial fibers

MerinoBalance™ MerinoBalance™

NaturalContact™

A material standard for fabrics engineered to sit directly against the skin.

- Natural fibers support breathability and temperature regulation.
- No synthetic fibers against the body during prolonged activity.
- Natural odor resistance without added chemical treatments.

INNER SELF Lightweight Merino Running LS in black — flat lay product shot

Lightweight Merino Running LS

$80.00 CAD
Sale price  $80.00 CAD Regular price 

Black

Size Only 1 remaining
Cedar is 6'2" / 189cm and wearing M.Juliette is 5'9" / 176cm and wearing XS.
Free shipping $175+Free 30-day returns and exchanges

Lightweight merino longsleeve with a relaxed athletic fit and raglan sleeve construction for unrestricted movement. Naturally breathable and temperature regulating. Built for year-round running.

MODEL

Features

▪ Raglan Sleeve Construction
▪ Flatlock Seams
▪ Relaxed Athletic Fit

Materials & Care

▪ MerinoBalance™ Fabric – 50% Merino Wool, 50% Modal
▪ Machine wash cold
▪ Lay flat to dry
▪ Do not tumble dry

Product Version

1.0
Released — September 10, 2025

SIZE A B
XS 19 24.5
S 20 25.5
M 21 26.5
L 22 27.5
XL 23 28.5
XXL 24 29.5
Lightweight Merino Running LS size guide
Cedar is 6'2" / 189cm and wearing M.
Juliette is 5'9" / 176cm and wearing XS.

Orders are processed within 1–2 business days. You'll receive a tracking number by email as soon as your order ships.


DUTIES & TAXES

All duties, taxes, and VAT are included in the price at checkout for every international order. No surprises on delivery. Canadian orders are domestic — no duties apply. Standard taxes are calculated at checkout.


SHIPPING

CANADA
Express Shipping — 1–5 business days
Free on orders $175 CAD and over · $9.99 CAD under

UNITED STATES
Express Shipping — 4–7 business days
Free on orders $175 USD and over · $14.99 USD under
Duties and taxes included at checkout.

EUROPE
Express Shipping — 6–10 business days
Free on orders €175 and over · €14.99 under
VAT and import duties included at checkout. No additional charges on delivery.

ASIA
Express Shipping — 2–15 business days
Free on orders $175 USD and over · $14.99 USD under
All duties and taxes included.

OCEANIA
Express Shipping — 6–10 business days
Free on orders $200 USD and over · $14.99 USD under
All duties and taxes included.

REST OF WORLD
Express Shipping — 10–30 business days
Free on orders $200 USD and over · $14.99 USD under (North and South America: $19.99 USD)
All duties and taxes included.


RETURNS & EXCHANGES

We accept returns worldwide within 30 days of delivery. Items must be unworn, unwashed, and in original condition with all tags attached. Sale items are final sale. Socks cannot be returned, exchanged, or refunded.

CANADA
Free returns and exchanges within 30 days of delivery. A prepaid return shipping label is provided.

UNITED STATES & ASIA
Free returns and exchanges within 30 days of delivery when Checkout+ is included with your order. Add Checkout+ at checkout to receive a prepaid return shipping label at no additional cost. Without Checkout+, we still accept returns within 30 days, but you pay for the return shipping label to Canada.

REST OF WORLD
We're working on bringing free returns to more countries. For now, we accept returns within 30 days of delivery, but free returns are not available. You arrange and pay for the return shipping label to our warehouse in Canada. We recommend a tracked service, as we can only refund items that reach us.

Refunds are issued to the original payment method within 5–7 business days of receiving the item. Original shipping fees are non-refundable.

Free exchanges are available within 30 days of delivery for Canadian orders, and for orders from the United States and Asia that include Checkout+. Start your return or exchange at innerselfrunning.com/returns. For other orders, return the item for a refund and place a new order; return shipping to Canada is paid by you.

Lightweight Merino Running LS is rated 5.00 out of 5

Based on 9 reviews

Audrey-AnneBLavoieVerified buyer

La qualité est magnifique !

Color: Black

CustomerVerified buyer

Love it! Perfect for running in cool weather.

Lightweight and comfortable, and it dries quickly.

Color: Off White

Vitor F.Verified buyer

Great dit

Color: Black

Bryan J.Verified buyer

love the fit and materials. great for cooler weather

Color: Black

Salar J.Verified buyer

Awesome product, shipping was super fast. I love the way it fits and the material is clearly top class

Color: Off White

Gwyneth Y.Verified buyer

Great material - warm, breathable, light, doesnt trap odour. My favourite running long sleeves! Worth the price imo.

Color: Off White

David P.Verified buyer

Amazing quality never felt something more comfortable than this longsleeve

Color: Black

VincentVerified buyer

Lightweight, comfortable, clean

Color: Off White

CustomerVerified buyer

Loving it

Color: Off White

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