Why We Love It The M-Series Cap serves as the fundamental template, making it the staple of Fractel's lineup. Fractel M-Series cap come standardised of a 58cm circumference, while this collection seamlessly merges unmatched performance with contemporary colour options.Talk Nerdy To Me M-Series caps are super durable, designed for outdoor adventurists and runners alike. Crafted from eco-friendly REPREVE® fabric, its highly durable, moisture-wicking, and lightweight. Made from 100% recycled materials, each cap features integrated UPF 50+ sun protection across the brim and front and back panels. Designed for real-world use, the M-Series is lightweight, packable, and machine-washable, ready for wherever your run takes you. Fast Facts- Made from 100% recycled fabrics- Eco-friendly REPREVE® fabric - Lightweight, durable & moisture-wicking - Machine washable- UPF +50 sun protection on the brim, front & back panel- Pliable Brim- Adjustable closure- Breathable mesh design