FEND One is the original award-winning folding bike helmet built for everyday riders. Using patented Smart-Fold Technology, it collapses by 50% to fit easily into any bag or backpack — so you’re never without protection. Built with a durable ABS shell, ultralight polycarbonate, and a high-impact EPS core, it delivers both style and strength in a sleek matte finish.

Designed and engineered in New York City, FEND One meets US CPSC and EU EN1078 safety standards and is perfect for cycling, e-scooters, skateboarding, and commuting under 20 mph. It features an adjustable dial-fit system and moisture-wicking padding for a secure and comfortable fit. Winner of the Red Dot and Edison Design Awards, FEND One combines innovation, portability, and everyday reliability. Available in Small (21½–22 in / 54–56 cm) and Medium/Large (22–24 in / 56–61 cm), backed by a 30-day money-back guarantee and accident-replacement program.

• Folds by 50% for Easy Storage – Patented Smart-Fold Technology lets the helmet collapse by half to fit in any backpack or bag. Always with you, never in the way.
• Award-Winning Design – Winner of the Red Dot and Edison Awards. Engineered in NYC with durable ABS, ultralight PC, and a high-impact EPS core. Sleek matte finish.
• Certified for Safety – Exceeds US CPSC and European EN1078 standards. Ideal for cycling, skateboarding, and e-bikes/scooters up to 20-mph.
• Lightweight & Comfortable – Integrated dial-fit system and extra padding provide a secure, personalized fit and all-day comfort.
• Sizing & Guarantee – Small (21½–22 in / 54–56 cm), Medium/Large (22–24 in / 56–61 cm). 30-day money-back guarantee + accident-replacement program.

30-day return policy and limited 1-year warranty.

1. Find a Measuring Tool: Use a string, shoelace, or USB cable to wrap around your head just above the eyebrows.
2. Mark & Measure: Mark where string overlaps and measure against a ruler or yardstick.
3. Choose Your Size: Use the above chart to select your size. If you’re in-between sizes, we recommend sizing up.