



Men's Venti Force Sierra Running Singlet
Light as air, cool to the touch, and engineered for hot-weather performance. The Venti Force Sierra Running Singlet combines ultra-breathable fabric, chafe-free finishes, and a clean, minimalist design for effortless speed. Built for summer miles and intense training sessions, it’s the run-day essential that feels like wearing nothing—so you can focus on everything.
- Estimated US delivery: Sep 20 - Sep 24
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Free shipping on US orders over $150
- Lucas wears size M is 5' 11" (180cm) and is 156lbs (71kg)
- Tight fit - we recommend sizing up if you like a looser fit
- Runs small
Every piece is made from high-performing fabrics which have exceptional qualities to help you get the best of yourself. Here are a few tips and guidelines to keep them in the best shape possible for as long as possible:
- Don’t let your items sit around dirty/sweaty
- It is best to wash all of your triathlon apparel separate from the rest of your wash
- High temperatures ruin fabrics so please hand wash or machine wash under delicate cold wash mode only (<85*F)
- Use high quality detergents free of dye, perfume or softeners
- Do not use fabric softeners, iron, dry clean or bleach
- Hang dry, do not tumble dry

Ultra-Light & Breathable
Made with an 86% polyester / 14% elastane blend for barely-there comfort on the hottest days.

Moisture-Wicking Performance
High-tech fibers draw sweat away to keep you dry, cool, and comfortable during long runs.

Chafe-Free Comfort
Heat-bonded finishes eliminate seams and irritation, elevating this singlet to premium status.

Freedom to Move
Wide arm openings and engineered side vents allow full range of motion and maximum airflow.
EVERY DETAIL MAKES A DIFFERENCE

Clean, Minimal Cut
A refined silhouette designed to stay out of your way and look sharp on and off the run.

Structured Surface Fabric
A soft-touch finish with a subtle texture that feels cool and barely noticeable against the skin.

Engineered Side Vents
Strategically placed vents keep air flowing where you need it most.

Why You'll Love It
On Hot Days, Less is More
When temperatures climb, every gram matters. The Sierra Singlet delivers barely-there lightness and advanced breathability so you stay cool, dry, and fast, no matter how hard the session or how high the heat.

Built-in Features
Minimalist Design, Maximum Performance
From heat-bonded hems that fight chafing to strategically engineered vents, every detail is crafted to disappear when you’re running—leaving only comfort and speed.

Feel & Function
Performance You Can Feel
- Feel: Ultra-Light, Soft Touch, Cool on Skin
- Fabric: 86% Polyester / 14% Elastane
- Finish: Heat-Bonded, Seam-Free Edges
- Fit: Clean Cut with Wide Arm Openings
- Function: Moisture Wicking, Breathable, Hot-Weather Optimized

Venti Force
Drawing inspiration from Venti, the Roman god of winds, the Venti Force Line embodies the relentless drive to harness power and momentum. Designed for athletes who are seeking reliable performance gear, the Venti Force Line combines functionality and affordability without compromising quality.
Crafted with durable materials and thoughtful design, this line is built to handle the demands of triathlon and cycling, offering comfort and versatility in every stitch. At Mauna, we believe the winds of change are what propel us forward, and the Venti Force Line captures this spirit, giving athletes the confidence to embrace their journey and keep moving toward their goals.
More From This Line

Men's Venti Force Sierra Trisuit

Men's Venti Force Sierra Cycling Windbreaker

Men's Ourea Pro Sierra Cycling Jersey
