Ultralight performance t-shirt with laser-perforated back and underarm ventilation zones. Finished with an athletic fit for unrestricted movement and enhanced breathability.

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

#4

[ Specs ]

[ 1 ] Laser-Perforated Back Ventilation

[ 2 ] Underarm Ventilation Zones

[ 3 ] Lightweight Performance Fabric

[ 4 ] Athletic Fit

INNER SELF Performance T-shirt in blue — detail 1 INNER SELF Performance T-shirt in blue — detail 2 INNER SELF Performance T-shirt in blue — detail 3
PacePro™
An ultralight performance fabric engineered for daily training in warm conditions.

Temperature Range: 10°C to 35°C

Température Celsius Température Fahrenheit

Weight: 125 GSM — Ultralight

[ Specs ]

Ventilation: Optimized for laser-perforated airflow zones

Moisture Management: Rapid sweat dispersion

Dry Time: Fast-drying performance construction

PacePro™

Performance T-shirt

$65.00 CAD
Sale price  $65.00 CAD Regular price 

Track Blue

Size
Elliot is 6'2" / 188cm and wearing M.Ophelie is 5'8" / 174cm and wearing S.
Free shipping $175+Free 30-day returns and exchanges

Ultralight performance t-shirt with laser-perforated back and underarm ventilation zones. Finished with an athletic fit for unrestricted movement and enhanced breathability.

MODEL

Features

▪ Laser-Perforated Back Ventilation
▪ Underarm Ventilation Zones
▪ Athletic Fit

Materials & Care

▪ PacePro™ Fabric – 88% Polyester, 12% Spandex
▪ Machine wash cold
▪ Hang dry
▪ Do not bleach

Product Version

1.0
Released — September 10, 2025

SIZE A B
XS 19.25 25.5
S 20.25 26.5
M 21.25 27.5
L 22.25 28.5
XL 23.25 29.5
XXL 24.25 30.5
Performance T-shirt size guide
Elliot is 6'2" / 188cm and wearing M.
Ophelie is 5'8" / 174cm and wearing S.

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.

Performance T-shirt is rated 5.00 out of 5

Based on 12 reviews

Yu T.Verified buyer

Really breathable on the back and the armpits where there are ventilations, would watch out for scratches for the sewing threads on the hem, because the black one that I got previously were easily broken after a few runs.

Color: Off White

Ryan G.Verified buyer

Nice fit

Color: Off White

Terry L.Verified buyer

Love the design and comfort

Color: Black

Yu T.Verified buyer

Lightweight and breathable, great ventilation for back and armpits area!

Color: White

Yu T.Verified buyer

Lightweight and breathable, great design for ventilation at armpits and back area!

Color: Black

Patrick S.Verified buyer

Comfortable, good quality

Color: Black

Sarah G.Verified buyer

J’adore le confort du t-shirt.

Color: Black

Sarah G.Verified buyer

Très confortable. Respire vraiment bien.

Color: White

Nicolas C.Verified buyer

Fit et style parfait.

Color: White

Jean-Claude L.Verified buyer

Great fit;
great quality

Color: White

Zachary H.Verified buyer

Très bonne qualité,10/10 envoi super rapide, le chandail est parfait le design aussi

Color: White

Alexandra P.Verified buyer

La qualité est incroyable!!!!

Color: White

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