Protos forestry helmet: what to check before you pay

Updated: 21 October 2026

You have a chainsaw job booked and a Protos forestry helmet in a browser tab. Pfanner sells the Integral as a Forest kit for work on the ground and an Arborist kit for chainsaw work off the ground.

You have a chainsaw job booked and a Protos forestry helmet in a browser tab. Pfanner sells the Integral as a Forest kit for work on the ground and an Arborist kit for chainsaw work off the ground. The Protos forestry helmet comparison lines up the amazon.co.uk rows. This page is the pass or fail list: the height of the work, the marks on the box, a head inside 54–62 cm, and a specialist price. Peter F. wrote it on 19 October 2026 from those listings, Health and Safety Executive guidance, and UK dealer pages. A purchase through our links may earn a commission at no extra cost to you.

Our top picks

Badge	Product	Kit named	Standards on the listing	Size stated	Note	Price	Offer
Best overall	Pfanner Pfanner Protos Integral Arborist (black)	Arborist	EN 12492, EN 397	Not stated	7.2	about £59.99	View offer
Best value	Protos Protos Integral Arborist (red/yellow)	Arborist	No EN number printed	Not stated	6.6	about £227.70	View offer
Alternative	Protos Protos Integral Forest (F39 title)	Forest	EN 397, EN 352-3, EN 1731	54–62 cm; visor clash	3.2	about £59.99	View offer

Best overall

Pfanner Pfanner Protos Integral Arborist (black)

7.2/10about £59.99

View offer

Best value

Protos Protos Integral Arborist (red/yellow)

6.6/10about £227.70

View offer

Alternative

Protos Protos Integral Forest (F39 title)

3.2/10about £59.99

View offer

On this page

1.Ground work or work at height
2.Marks and paperwork
3.Head size and the two clips
4.What a complete helmet costs

Ground work or work at height

Start with where the saw will be. A Forest is the ground helmet: integrated hearing protection, a metal visor, and forestry on the ground. An Arborist adds a Maclip chin strap and a crash absorber, and UK shops state EN 12492 alongside EN 397. If the chainsaw leaves the ground, the Forest page is the wrong product. The Health and Safety Executive lists BS EN 397, BS EN 14052 or BS EN 12492 on the ground, and BS EN 12492 off it. An Arborist that carries EN 12492 can stay on the ground when your risk assessment allows it. A Forest kept for a climb fails the check. The Forest versus Arborist page stays on that split.

Marks and paperwork

For a ground Forest, look for EN 397 on the helmet, EN 352-3 on the muffs, and EN 1731 on the mesh visor. For an Arborist, look for EN 12492 as well as EN 397. The same HSE chainsaw page still wants eye protection to EN 166. Mesh and glasses answer different hazards, which is why the chainsaw mesh visor page sits beside this checklist. Workplace PPE on the Great Britain market should be UKCA or CE marked, with English instructions and a declaration of conformity. UK shops, including Radmore & Tucker, print an SNR of 26 dB on Protos muffs, and one Swiss page prints 27 dB. Use the number on the muffs in your box. It assumes the cups seal.

Testsieger

Pfanner Pfanner Protos Integral Arborist (black)

7.2/10about £59.99

View offer

Head size and the two clips

The standard shell is one size, 54–62 cm. Measure level around the widest part of your head, above the ears and across the forehead, before you order. A tape on a bun or a cap will miss the cradle. A small neck pad is sold for about 52–60 cm, and a large neck closure for about 56–64 cm. Each clip moves the range by about 2 cm. They are spare parts, and they do not turn every head into a fit. If you sit near either end, tell the seller before you pay. One reviewer with a 24 inch head said they were at the maximum of the one size. That note is a single report from outside the United Kingdom.

What a complete helmet costs

In October 2026 a Forest on a UK specialist shelf sits at about £180–£190. An Arborist runs from about £190 excluding VAT up to about £276. Carbon finishes are a colour and a price step. B00I52AP8W at £227.70 and B07FXVDB3B at £253 sit in that band. The £253 page does not name a visor, muffs or a standard. Headers of £49.99 or £59.99 sit outside the shelf, including the black Arborist that prints EN 12492. B07FXXGF1R shows £233 while its table copies another ASIN. The best Protos helmet page names who should open which kit once these checks pass.

Common questions

What head size fits a Protos before the extra clips?

The standard shell is 54–62 cm, measured level around the head. A small neck pad is sold for about 52–60 cm and a large neck closure for about 56–64 cm. Each clip moves the band by about 2 cm. The clips are missing from several titles, so a head outside 54–62 cm needs the seller before you rely on them.

Which standard do I need if I stay on the ground?

The Health and Safety Executive lists BS EN 397, BS EN 14052 or BS EN 12492 for helmets used on the ground. A Forest kit is sold against EN 397, with muffs to EN 352-3 and a mesh visor to EN 1731. EN 12492 remains available on the ground when your risk assessment allows it. Read the marks on the shell you receive.

Which standard do I need if I climb?

Off the ground, the Health and Safety Executive asks for BS EN 12492. UK Arborist pages state EN 12492 and EN 397, and they include a chin strap and a crash absorber. A Forest described with EN 397 is the ground kit. A low amazon.co.uk header is a stored figure, and it does not show that a climbing helmet has been supplied. Leave the Forest as a Forest.

How long is the shell meant to stay in service?

UK shops say replace the shell every five years, with shorter intervals for the strap and the pads. They disagree on whether the clock starts at manufacture or at first use, and the manual does not give one date. Read the stamp in your shell. A crack, a heavy blow, or a strap you can no longer set evenly is a reason to retire it sooner.

Why do some amazon.co.uk Protos titles show about £50?

Specialist UK shelves in October 2026 sit near £180–£190 for a Forest and about £190 excluding VAT up to £276 for an Arborist. Stored headers of £49.99 and £59.99 sit away from that shelf. Some listings also copy another ASIN’s table, or they clash on visor grade. Open the live offer before you set that figure beside a dealer price.

How to fit a Protos helmet