A straight line and a trimmer that pops up
A foil shaver cuts in straight lines behind a perforated screen, which suits a face shaved daily and a jaw with defined edges. The count of foils and cutters is the headline figure; the parts that matter alongside it are the pop-up trimmer for sideburns and mustache edges, whether the body is rated for use in the shower, and the published runtime against charge time. Foils and cutters are replaced together on most ranges, and manufacturers publish an interval — we report it where they do, and say so where they do not.
2 foils + MicroComb · 3 flex blades · 100% waterproof · 45 min · made in Germany
Two Braun foils either side of a middle trimmer, three flexing blades, a MicroComb that Braun states catches more hair per stroke, a body it states is 100% waterproof, and forty-five minutes of runtime with a five-minute quick charge.
Best for: A daily shave, wet or dry, with a narrow head for under the nose.
3 blades · pop-up trimmer, 30 blades · 54 min · rinsable
A three-blade foil shaver with arc-shaped foils shaped for under the chin, a pop-up trimmer carrying thirty blades of its own, an hour to charge for fifty-four minutes of use, and a head that rinses under running water.
Best for: A daily dry or wet shave, with the head rinsed at the tap afterwards.
≈ $120
3 blades, 30° nano-edged · linear motor 39,000/min · beard sensor · 8-way head
Three Japanese stainless blades ground at 30 degrees, a linear motor running 39,000 cutting actions a minute, a beard density sensor, a head flexing in eight directions, plus a shaving-foam mode, a travel lock and a three-minute quick charge.
Best for: A dense or uneven beard, shaved wet with foam.
5 blades · linear motor 70,000/min · 16D flex head · beard sensor
Five blades, a linear motor at 70,000 cutting actions a minute, and a head that moves in sixteen independent directions. Panasonic states the steel blades shave as on the first day for five years, tested against artificially aged units.
Best for: A thick beard shaved daily, where the number of passes is the actual complaint.
≈ $185
Two shavers on this shelf publish a runtime: 54 minutes on the Panasonic ES-RT37, 45 minutes on the Braun 3040si. The other two do not give one.
For a daily shave on a regular beard, a model with no frills does exactly the job expected.
Panasonic publishes the rate of its linear motors: 70,000 cutting actions a minute on the ES-LV67, 39,000 on the ES-ALT4B.
In straight movements, against the grain, without pressing. The movement is linear, unlike rotary which works in circles.
Generally every one to two years, and immediately if the foil is distorted or perforated. A perforated foil can injure the skin.
Only if the model is declared waterproof. Otherwise, brush and dry, never under the tap.
A drop of oil on the cutters now and then reduces friction and heat build-up. It is often recommended by makers.
Increased friction from worn blades or lack of lubrication. Unusual warmth signals maintenance due.
It depends on the person more than on the technology. Applied pressure and blade condition count more than the system.
You have to run the pop-up trimmer first, or the foil clogs. That is the format's limit.
No, they are model-specific. An approximate foil will not fit and damages the carrier.
The foil is used in straight lines, without pressing: a different movement from rotary. A perforated or distorted foil is replaced immediately, unusual warmth signals worn blades — and on three days of growth, run the trimmer first.
Specifications that fewer than four of these models in five publish are left out of this table. Keeping them would fill it with blanks and make a shared gap look like a difference.
| Model | Price | Blades |
|---|---|---|
| Panasonic ES-RT37 | $120 | Three-blade cutting system |
| Panasonic ES-LV67 | $185 | Five, Japanese steel, inner cutters ground at 30° |
| Braun 3040si | — | Three flexing blades, following the contours |
| Panasonic ES-ALT4B | — | Three, Japanese stainless, ground at 30° |
Specifications: manufacturer sheets for grooming tools and the matching Amazon product pages. Prices and availability: Keepa. Every figure in this table names its source.
Most recent revision in this category: October 12, 2026.
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
