Are the black pieces outside, meant to secure headlamp straps?

This helmet does not have a way to secure headlamp straps. For best results, buy a Petzl headlamp that's compatible with the Vertex. Remove the straps from the Petzl headlamp, then attach the Petzl headlamp to a Petzl headlamp adapter, and finally insert the headlamp/adapter assembly into the headlamp slot in front of the helmet.

Is the chin strap removable?

The chin strap is not removable, it is replaceable.

Do they come in different sizes or are they one-size-fits-all?

There is only one size & they have a thumb wheel to adjust the fit/sizing. Per Petzl the head circumference is: 53-63 cm.

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Description

🧗‍♂️ Elevate your safety game with the PETZLVertex – where lightweight meets legendary protection!

FEATHERLIGHT PROTECTION - At just 490 grams, experience top-tier safety without the bulk slowing you down.
VERSATILE SAFETY FOR PROS - Designed for rescue, climbing, arborist work, and high-angle safety—your all-in-one helmet solution.
ENGINEERED FOR EVERY SEASON - Durable ABS and advanced polymers provide year-round resilience in any environment.
PRECISION FIT ALL DAY COMFORT - Adjustable 53-63 cm headband ensures a secure, personalized fit for every climb.
CERTIFIED FOR THE TOUGHEST CHALLENGES - Meets CE, EN 397, EN 12492, ANSI Z89.1, and more—trusted by professionals worldwide.

The PETZLVertex Helmet is a professional-grade climbing helmet featuring a lightweight 490g design and an adjustable 53-63 cm headband for a custom fit. Constructed from durable ABS, polyamide, and polycarbonate materials, it meets multiple international safety standards including CE, EN 397, EN 12492, and ANSI Z89.1. Ideal for rescue, climbing, and arborist applications, this helmet offers year-round protection and comfort for serious outdoor professionals.

Specifications

Age range	Adult
Color	White
Size	UNI
Item display length	9 inches
Material type	Abs (Acrylonitrile Butadiene Styrene), Polyamide, Polycarbonate, High-Strength Polyester, Polyethylene
Number of items	1
Outer material	Acrylonitrile Butadiene Styrene (ABS)
Seasons	Year-round
Features	Adjustable
Usage	rescue climbing arborist professional high angle safety
Sport	Climbing
Included components	See the description
Batteries included?	No
Brand	PETZL
Department	Unisex
Manufacturer	Petzl
Item model number	H43375
Product Dimensions	27.99 x 22 x 16 cm; 490 g
ASIN	B07NCN7X1W

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