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Part# 13-21584


This aviation helmet is made out of a fiberglass composite, utilizing Koroyd® and an anti-microbial comfort liner making it the lightest aviation helmet on the market. Features Fire Retardant trim and a FIDLOCK™ buckle system. Works with any aftermarket in helmet communications devices.

California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • Airflow Comfort Liner - Is a breathable material that promotes air flow circulation and cooling. Made from FireBlock, a fire resistant composite, and Ariaprene, this moisture wicking liner draws sweat away from the wearers head.
  • Pure Optics Goggle - The Anti-fog UV lens provides premium optics, reduces glare and supports a wider field of vision. TPR molded Visor Retainers mounted on the shell keep the visor from sliding off the helmet.
  • Flow-Vents - Promotes ventilation and enhanced cooling with strategically engineered exhaust ports designed to pull cool air in and push hot air out.
  • Fidlock® - Quick ReleaseAllows the fasteners to be conveniently opened and closed single handedly.
  • PolyFusion Shell - Is the first line of impact defense and is designed to withstand the impact forces you’ll encounter inside the cockpit. In addition, this shell is engineered to maintain structural integrity in extreme temperatures.
  • Headset integration - The AV-1 KOR’s shell is designed to fit a wide variety of communication units to suit the wearers aviation needs.
  • Snap Lock TPR - This rear mounted TPR strap secures the shield and utilizes a button snap closure system.
  • Clarity aloft headsets- Offers a quick and easy no install solution to flying with a LIFT AV-1 KOR.


Internal Size Chart

Size Circumference in IN Circumference in CM
Medium Under 23" Under 58.5 CM
Large 23-23.8" 58.5-60.5 CM
Extra Large Over 23.8" Over 60.5 CM

External Helmet Dimensions

Helmet Size Height in CM/IN Width in CM/IN
Medium 23.20 / 9.13" 20.82 / 8.19"
Large 23.84 / 9.38" 21.5 / 8.46"
Extra Large 24.39 / 9.60" 22.19 / 8.73"


I purchased the KOR-1 with Active Headset comms and am 100% happy with the investment. I fly a Quicksilver MX Sprint and Flightstar II, both with noisy open (or semi-enclosed) cockpits. The helmet is extremely lightweight, fits perfectly and the ANR makes a huge difference in noise reduction and audio clarity. Ive received a number of compliments from other pilots on the clarity of the audio, even in flight.

Aran E
August 17, 2020


Please note,'s personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: I frequently fly a Stearman and use a David Clark H10-30 headset with a CEP system in a cloth helmet. I would like more head protection, but the information on the website totally fails to address what makes of communication equipment can be installed in your helmets and how it can be done. Can you provide specific information? Thank you.

Per the manufacturer, your David Clark headset will fit in this helmet but you will need someone to install them in. You can also look at 11-10263 which will also take your headset.