TRI-FIT SiTech Women's Running Singlet

£55.00 GBP
Tax included Shipping calculated at checkout.
Shipped from United Kingdom


Award-winning premium quality
Designed by triathletes
Cutting-edge performance meets comfort and style

Size Guide

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Key Features

  • Tailored fit
  • Thermo-welded seams
  • Laser cut ventilation
  • Lightweight and breathable
  • Four-way stretch fabric
  • Front/side and back reflective details
  • Rounded neckline


Introducing the TRI-FIT SiTech Women's Running Singlet – the ultimate women's running vest designed to keep you cool and free in warm weather, ensuring maximum comfort and performance during your runs.

Crafted from a lightweight and stretchy fabric, this singlet prioritizes breathability with minimal weight. The tailored fit and Y back design offer complete freedom of movement, making it ideal for purposeful training or intense runs in warm weather. The shoulder construction moves seams away from high-motion areas, preventing rubbing and complementing the SiTech Bra perfectly.

The rounded neckline enhances on-body comfort specifically for running, and laser-cut ventilation across the top of the chest aids heat release. Thermo-bonded seams and hem contribute to weight reduction, while reflective elements at the front, side, and rear ensure visibility in low light conditions.

The TRI-FIT SiTech Women's Running Singlet is not just a running vest; it's your perfect lightweight training top for all warm weather running sessions. Stay comfortable, cool, and visible with this essential women's running singlet.


TRI-FIT offer premium quality tri suits, cycle clothing, running gear and athleticwear. Developed by triathletes, made with you in mind.

TRI-FIT was created after founder Dan Evans raced at IRONMAN Dubai 70.3 in 2017. Disappointed with the leading tri suit he wore for the race, he was determined to create something better. Starting with just a pencil and paper, the initial design for the original TRI-FIT EVO tri suit was soon developed into an award-winning tri suit after being put through its paces with extensive testing - covering 1,000km. The EVO soon became a favourite with triathlon experts, earning itself the 220 Triathlon 'Best on Test' award for three consecutive years.

Now based in the UK, TRI-FIT has expanded its product ranges offering next-level kit for triathletes, runners and cyclists alike. The EVO tri suit is now joined by a range of cutting edge suits such as the GEO and the GEO LIGHTNING, offering the balance of aerodynamics, comfort and practicality you need to maximise your performance on race day. Training sessions can be ticked off in style with a range of cyclewear, swimwear and running gear/athleticwear.

Garnering global awards and praise, TRI-FIT is set on becoming the world's premier triathlon clothing brand, fuelled by innovation and a commitment to excellence in the evolving multi-sport landscape. Gear up for your next personal best, with TRI-FIT.

Stock Location & Shipping

SBRX is a marketplace and does not stock nor ship this product. It is stored and shipped by TRI-FIT from:

  • United Kingdom

Please consider any relevant import duties or taxes before purchasing.

Shipping Times

All orders are passed to & processed by the vendor within 1 working day, with estimated delivery times:

  • Europe - 7 working day(s)
  • United Kingdom - 3 working day(s)
  • United States - 7 working day(s)
  • ROW - 7 working day(s)
Cancellations & Returns

To cancel an order before you have been notified it has been shipped please email

Returns & Refunds

TRI-FIT allows returns and refunds within 30 day(s) of your order being fulfilled.

To initiate your return & refund please email