Men's Zero Shorts Iron / BlackOn Zero Shorts Lightweight Performance with Built In Storage The On Zero Shorts combine lightweight construction with practical storage for training and race day. Engineered with stretch woven fabric on the outer and a quick drying soft feel inner brief, these shorts deliver distraction free performance whilst providing the ventilation and pocket capacity needed for longer efforts. Ultra Lightweight Race Ready Construction The outer uses stretch woven

On Zero Shorts - Lightweight Performance with Built-In Storage

The On Zero Shorts combine lightweight construction with practical storage for training and race day. Engineered with stretch-woven fabric on the outer and a quick-drying soft-feel inner brief, these shorts deliver distraction-free performance whilst providing the ventilation and pocket capacity needed for longer efforts.

Ultra-Lightweight Race-Ready Construction

The outer uses stretch-woven fabric engineered for race day performance, keeping weight minimal whilst allowing natural movement. A soft-feel, quick-drying inner brief provides comfort without bulk. An adjustable waistband delivers a comfortable, customisable fit that stays secure across varied paces.

Perforated Fabric for High Ventilation

Perforated outer fabric improves ventilation, helping you feel fresh as you pick up the pace. This strategic perforation provides airflow where heat builds up most, particularly valuable during faster efforts or warmer conditions.

Built-In Storage for Gels and Essentials

One zip pocket and two mesh pockets at the back provide storage for essentials and energy gels. The zip pocket secures valuables, whilst the two mesh pockets provide easy access to gels during efforts.

Key Features:

- Lightweight stretch-woven outer fabric

- Soft-feel, quick-drying inner brief

- Perforated outer for improved ventilation

- One zip pocket at back

- Two mesh gel pockets at back

- Adjustable waistband

- Graphic inspired by prints worn by On athletes

Best For:

- Race day (5K to marathon)

- Tempo runs

- Long training runs

- Speed sessions requiring gel storage

Are the On Zero Shorts Right for You?

Built for runners who want lightweight, ventilated performance with practical storage for training and racing. If you're racing distances requiring gels, training on long runs needing nutrition storage, or prefer shorts with proper pocket capacity rather than belts or vests, these deliver. The perforated ventilation suits runners who overheat easily, whilst the lightweight construction appeals to anyone wanting race-ready kit without unnecessary weight.