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CIRCUMFERENCE
(CM)
HOW TO MEASURE THE CIRCUMFERENCE OF YOUR HEAD
Wrap a soft measuring tape around the widest part of your head and note the length. If you don’t have a soft measuring tape, you can use any charging cable, string, or rope and lay it against a ruler.
BETWEEN SIZES?
If you’re between sizes, we recommend sizing up. You'll be able to tighten the helmet for a perfect fit using the retention strap system.
NEED HELP?
We’re here to help, email us at help@ventete.com. We’ll aim to reply within 2 business days.
44.1% SAFER
'Ventete technology reduces liner brain injury risk by 44.1% compared to the best performing of the 30 most popular conventional cycle helmets used in the UK.' — HEAD Lab, Imperial College London.
Read full study here.
To best protect your head, The aH-1 helmet is made in Switzerland for exquisite quality of manufacture and trusted safety performance.
Fully Certified to EU and UK (BS EN 1078:2012 + AI:2012) testing standards.
ENHANCED ROTATIONAL IMPACT PROTECTION
Developed in collaboration with RHEON™ Labs, the aH-1 internal liner features a non-newtonian superpolymer. The liner is soft and flexible in its natural state to adapt to your head for a superior fit. On impact, the material stiffens dynamically, shearing in multiple axes to dissipate energy and protect the head.
Working seamlessly with Ventete’s pneumatic structural system, the liner effectively controls and reduces rotational forces—the primary cause of traumatic brain injuries in accidents.
INFLATES IN 30 SECONDS
Always within reach. The Ventete aH-1 helmet deflates to 10% of its inflated size to take up less space than a laptop.
Included USB-C rechargeable pump and on-helmet pressure indicator make inflation and deflation simple.

HELMET SIZING
CIRCUMFERENCE
(CM)
HOW TO MEASURE THE CIRCUMFERENCE OF YOUR HEAD
Wrap a soft measuring tape around the widest part of your head and note the length. If you don’t have a soft measuring tape, you can use any charging cable, string, or rope and lay it against a ruler.
BETWEEN SIZES?
If you’re between sizes, we recommend sizing up. You'll be able to tighten the helmet for a perfect fit using the retention strap system.
NEED HELP?
We’re here to help, email us at help@ventete.com. We’ll aim to reply within 2 business days.
ENGINEERED TO KEEP YOU COOL
The air structure of the Ventete aH-1 is less insulative than conventional foam helmets, keeping you cooler by allowing heat to dissipate with superior efficiency into the surrounding environment. Linear internal channels draw unbroken airflow over the whole head.
Holistic material innovation engineered to keep you comfortable while you ride.
BUNDLE: HELMET + PUMP
The Ventete aH-1 ships with the Ventete x Fumpa Pumps Mini.
Ultimate protection. Perfectly portable.

HELMET SIZING
CIRCUMFERENCE
(CM)
HOW TO MEASURE THE CIRCUMFERENCE OF YOUR HEAD
Wrap a soft measuring tape around the widest part of your head and note the length. If you don’t have a soft measuring tape, you can use any charging cable, string, or rope and lay it against a ruler.
BETWEEN SIZES?
If you’re between sizes, we recommend sizing up. You'll be able to tighten the helmet for a perfect fit using the retention strap system.
NEED HELP?
We’re here to help, email us at help@ventete.com. We’ll aim to reply within 2 business days.