Open comb vs closed comb
The internet treats open comb as a synonym for aggressive. It is not - it is a clearance feature, and that distinction changes who should buy one.
By Sawyer V. · Published · Last updated
We have not tested any of this. Everything below is compiled from published manufacturer specifications, and the arithmetic is printed so you can check it. This page carries affiliate links: if you buy through one we earn a commission at no extra cost to you, and it does not change the order of the picks. Full disclosure.
The short answer
Buy a closed comb. It is the right answer for almost everyone, including every beginner, and it is what the Merkur 34C and Mühle R89 both use. An open comb is a clearance feature, not an aggression setting: the teeth let long hair and thick lather pass through the head instead of clogging it. That matters if you are shaving down a week of growth. It does nothing for a daily shaver.
| # | Pick | Lasts | Score | Price |
|---|---|---|---|---|
| 1 | Merkur 34C HD One razor, no research | 5,200 shaves* | 8.9/10 | $60.00 - view on Amazon |
| 2 | Mühle R89 The mildest of the classic three | 5,200 shaves* | 8.7/10 | $48.00 - view on Amazon |
| 3 | Henson AL13 Medium The lightest touch, machined to spec | 5,200 shaves* | 8.5/10 | $14.95 - view on Amazon |
Prices last verified September 24, 2026. They move constantly; the figure on Amazon when you click is the real one.
What the comb actually is
The bottom half of a safety razor head - the part your skin touches just before the blade does. Two designs.
- Closed comb. A solid bar running the length of the head, parallel to the edge. It presses the skin flat immediately ahead of the blade. Sometimes the bar is scalloped, which is a texture, not a different category.
- Open comb. A row of teeth instead of a bar. The gaps between the teeth let hair and lather pass up through the head rather than piling against it.
That is the entire mechanical difference. Everything else attributed to open combs is actually a statement about the particular razors that happen to use them.
Why the aggression myth persists
Because it is correlated without being causal. Historically, open comb razors were made for an era with less frequent shaving and coarser preparation, so they tended to be built with larger blade gaps. Modern open combs inherited both the geometry and the reputation.
The figures that actually set aggression are blade gap and blade exposure. Henson publishes an exposure figure and a machining tolerance, which is close to unique in this category and the reason it appears in the sensitive-skin roundup. Almost nobody else publishes either number, which is why most comparisons in this category are vibes.
| Property | Set by | Published by anyone? |
|---|---|---|
| How aggressive it feels | Blade gap and exposure | Rarely - Henson and Rockwell are the exceptions |
| How well it clears hair | Comb style | Yes, in the product name |
| How much pressure you apply | Weight and handle | Usually yes |
| How forgiving the angle is | Head geometry | Almost never |
The clearance argument, which is the real one
A closed comb head has one narrow slot for lather and cut hair to escape through. On a daily shave with two days of growth, that is plenty. On five days of growth it packs solid after two strokes and you spend the shave rinsing.
An open comb has gaps the width of the teeth. Hair and lather go up and out. If you shave twice a week rather than daily, or your beard is genuinely coarse, that is a real convenience and it is the honest reason to want one.
What each actually feels like
A closed comb feels like the razor is riding on a rail. There is a definite plane, you find the angle quickly, and the bar limits the worst outcome of getting it slightly wrong.
An open comb feels more direct, because less of the head is touching skin. Some people read that as sharper and some as more responsive; both are describing the same reduction in contact area. It also means the razor is less self-locating, so a wandering angle wanders further.
Which to buy
- First razor, any beard: closed comb. The Merkur 34C and the Mühle R89 are both closed comb and both on the main roundup for exactly that reason.
- Sensitive skin: closed comb, and prioritize a published exposure figure over the comb question entirely.
- Shaving down several days of growth regularly: an open comb is a genuine convenience - or trim first, which is cheaper.
- Wanting to try something different after a year: fine, and enjoy it. Just do not expect it to fix irritation, which is almost always pressure.
Every pick, with the working
Each entry shows the published specifications, the axis scores they produce and what you give up. The order is the computed order, not a commercial one, and the arithmetic is open underneath every score.
Our pickOne razor, no research
Merkur 34C HD
Buy this one if you want to stop reading and start shaving. It is 68 grams of chrome-plated brass on a short knurled handle, which is heavy enough that you naturally stop pressing, and the head is a plain closed comb with nothing to set, adjust or get wrong. It has been in production in Solingen for decades, so parts, advice and blades are everywhere.
- Weight
- 68 g
- Length
- 80 mm
- Material
- Chrome-plated brass
- Head
- Closed comb, two-piece
- Blade gap
- Not published
- Blades in the box
- 0
- Made in
- Germany
- Refill
- Universal standard
- Warranty
- Not published
- Assumed service life
- 5,200 uses
The arithmetic: 260 shaves a year x 20 years of assumed service life = 5200 shaves.
What it gets right
- 68 g in a 80 mm body: the weight does the work, which is exactly the habit a cartridge user has to unlearn
- Closed comb with no adjustment, so there is one variable fewer on your first month
- Two-piece construction; the head unscrews as a unit and there is nothing to lose in the sink
- Takes any standard double-edge blade, so the refill is a commodity
Flaws
- The 80 mm handle is short for large hands, and Merkur's own longer handles are a separate purchase
- No blade in the box, so the first order needs a blade pack alongside it
- Chrome over brass will show wear at the edges over years in a way stainless will not
The working behind the 8.9
- How long it lasts: not scored
- Not scored. This is a durable item, not a consumable, so how long it lasts is an assumption about service life rather than something the pack size tells us.
- Ease of switching: 8.5
- Closed comb (+), no adjustment to set (+), 68 g published weight in the range where the razor's own mass supplies the pressure (+), no blade included so the first order is two items (-).
- Refill economics: 10.0
- The refill is a commodity standard that dozens of factories make, so the price is set by competition and no single maker can raise it.
- What the maker publishes: 8.6
- 6 of 7 specifications a buyer would expect are published: weightG, lengthMm, material, madeIn, headType, bladesIncluded. Not published: bladeGapNote. 6 / 7 x 10 = 8.6.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from Merkur 34C HD listed specifications (Fendrihan).
2The mildest of the classic three
Mühle R89
The R89 is the lightest of the three classic closed combs at 64 grams and the only one that puts a blade in the box, which matters more than it sounds when the alternative is ordering two things and waiting for both. Mühle publishes a 41 x 94 mm envelope and nothing else, which is the one place it is less forthcoming than Edwin Jagger.
- Weight
- 64 g
- Length
- 94 mm
- Material
- Chrome-plated metal, engraved handle
- Head
- Closed comb
- Blade gap
- Not published
- Blades in the box
- 1
- Made in
- Germany
- Refill
- Universal standard
- Warranty
- Not published
- Assumed service life
- 5,200 uses
The arithmetic: 260 shaves a year x 20 years of assumed service life = 5200 shaves.
What it gets right
- Ships with a blade, so it is a complete first purchase on its own
- 64 g — the lightest of the three classics, which suits a lighter touch
- Closed comb, nothing adjustable, chrome-plated with an engraved handle for grip
- Standard blade fitment
Flaws
- Mühle does not publish a blade gap, so its mildness cannot be compared numerically to anything
- Lightest of the three, which means slightly more of the pressure is yours to supply
- One blade in the box is a sample, not a supply
The working behind the 8.7
- How long it lasts: not scored
- Not scored. This is a durable item, not a consumable, so how long it lasts is an assumption about service life rather than something the pack size tells us.
- Ease of switching: 8.0
- Closed comb (+), no adjustment (+), one blade included so it works on arrival (+), 64 g is the lightest of the classic three, so slightly more pressure is yours to control (-).
- Refill economics: 10.0
- The refill is a commodity standard that dozens of factories make, so the price is set by competition and no single maker can raise it.
- What the maker publishes: 8.6
- 6 of 7 specifications a buyer would expect are published: weightG, lengthMm, material, madeIn, headType, bladesIncluded. Not published: bladeGapNote. 6 / 7 x 10 = 8.6.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from Mühle R89 listed specifications (Maggard Razors).
3The lightest touch, machined to spec
Henson AL13 Medium
Henson's argument is that razor burn is an engineering problem, and it publishes the tolerances to back it: blade angle fixed at 30 degrees, machined to as tight as 12.7 micrometers at an aerospace facility in Ontario. At 37 grams it is by far the lightest razor here, which inverts the usual advice — you cannot let this one do the work, you have to let it float.
- Weight
- 37 g
- Length
- Not published
- Material
- Aircraft aluminum, Type II anodized
- Head
- Fixed exposure, 30-degree blade angle
- Blade gap
- Machined to as tight as 12.7 micrometers; exposure fixed by model
- Blades in the box
- 5
- Made in
- Canada (Ontario)
- Refill
- Universal standard
- Warranty
- Not published
- Assumed service life
- 5,200 uses
The arithmetic: 260 shaves a year x 20 years of assumed service life = 5200 shaves.
What it gets right
- Published machining tolerance of 12.7 micrometers and a fixed 30-degree blade angle, which nobody else in this ledger discloses
- 37 g aluminum body with a Type II anodized finish; nothing to chip or peel
- Five blades in the box
- Sold in Mild, Medium and Aggressive so the choice is made once, at purchase, rather than every morning
Flaws
- 37 g is very light, which removes the weight cue a cartridge user relies on
- The exposure level is fixed at purchase; changing your mind means another razor
- Aluminum will not feel like the heirloom object a stainless razor does
The working behind the 8.5
- How long it lasts: not scored
- Not scored. This is a durable item, not a consumable, so how long it lasts is an assumption about service life rather than something the pack size tells us.
- Ease of switching: 7.5
- Fixed geometry with a published 30-degree blade angle removes the angle guesswork (+), blades included (+), but 37 g is the lightest here and the razor's own mass supplies almost none of the pressure (-).
- Refill economics: 10.0
- The refill is a commodity standard that dozens of factories make, so the price is set by competition and no single maker can raise it.
- What the maker publishes: 8.6
- 6 of 7 specifications a buyer would expect are published: weightG, material, madeIn, headType, bladeGapNote, bladesIncluded. Not published: lengthMm. 6 / 7 x 10 = 8.6.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from Henson AL13 published specifications.
Prices last verified September 24, 2026. They move constantly; the figure on Amazon when you click is the real one.
Questions people actually ask
Is an open comb more aggressive?
Not inherently. Aggression is set by blade gap and blade exposure - how far the edge sits from the guard and how far it protrudes - and either comb style can be built mild or aggressive. Many open combs happen to be aggressive, which is where the reputation comes from, but the comb is not the cause.
What is a safety bar?
The solid bar on a closed comb razor that runs parallel to the blade edge. It flattens the skin just ahead of the blade and limits how much edge can reach it. Some are smooth, some are scalloped - a scalloped bar is still a closed comb, not an open one.
Which should a beginner buy?
Closed comb, without hesitation. There is nothing an open comb does for a first-month shaver that a closed comb does not, and the closed bar is a physical limit on how much blade can meet skin. The beginner roundup is entirely closed comb for that reason.
When is an open comb actually better?
Two cases. Shaving down growth of several days or more, where a closed head clogs after two strokes. And very thick, coarse beards where even daily lather packs the head. If neither describes you, the comb style is not your decision to make.
Do any razors publish their blade gap?
Very few. Rockwell publishes six gaps across its plates, which is the exception - that is the whole argument for an adjustable razor. Merkur and Mühle both publish “not published” territory here, which is why this comparison has to be about mechanism rather than numbers.