On Lightweight Cap
Model Size Information
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Minimal Weight. Maximum Performance.
The On Lightweight Cap is designed for runners who want ventilation, sun protection, and a featherlight fit—all in one sleek package. Crafted with ultralight materials and precision laser-cut ventilation, this cap delivers performance without distraction. Whether you're pushing through speedwork, long runs, or race day heat, it keeps you cool, dry, and focused.
Key Features
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Ultra-lightweight design for zero-bulk, barely-there feel
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Laser-cut ventilation holes enhance breathability and airflow
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Moisture-wicking sweatband keeps you dry and comfortable
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Fast-drying fabric ideal for high-intensity or humid conditions
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Adjustable back strap ensures a customizable and secure fit
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Low-profile brim offers sun protection with an aerodynamic shape
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Built for running, training, racing, and recovery days alike
Size & Fit
- One size
- Head circumference:21.7-23.6
How to measure head circumference-Measure around your forehead, keeping the tape parallel to the floor.

Materials
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Main Fabric: 100% Recycled Polyester
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Sweatband: Moisture-wicking technical blend
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Lightweight and sustainable design, true to On’s performance ethos






















































































