The measured head circumference decides the size, not the S/M/L label · review
Giro’s Agilis in Medium, with Integrated MIPS, the Roc Loc 5 fit system and a two-piece hardshell fused to its EPS liner.
Our conclusion The only helmet here with a named fit system and a two-piece shell described part by part: a hard outer shell, a polycarbonate lower wrap fused to the liner, Integrated MIPS, and Roc Loc 5 adjusting both tension and fore-aft tilt one-handed. At $119.95 it is also the one that names no safety standard at all, and publishes no weight of its own — the 671 g (23.7 oz) on its shipping record is the box.
A Medium Giro Agilis: a two-piece shell — a hard outer shell with a polycarbonate Hardbody lower wrap fused permanently to the EPS liner by Giro’s In-Mold process — Integrated MIPS, the Roc Loc 5 fit system, and Wind Tunnel ventilation. $119.95, nearly five times the cheapest helmet on this page.
“Allows you to easily custom-tune the fit tension and fore-aft tilt of a helmet in seconds, using a single hand.”
Two axes. Every other helmet in this group has a dial that tightens a cradle; this one also changes the angle at which the cradle sits, which moves the helmet’s front edge up or down on the forehead.
The introduction to this shelf names that distinction: dial systems allow finer changes than a sliding band, “and only some adjust in height as well”. This is one of them.
Why it matters is fit rather than comfort. A helmet sitting too far back leaves the forehead uncovered, and a cradle that cannot be tilted cannot correct it.
“The two-piece shell combines a tough outer hard shell with a polycarbonate lower shell permanently fused to the liner.”
Most helmets at this price are pure in-mold: a thin polycarbonate skin bonded to foam in the mold. The Agilis adds a harder outer over the top and extends the polycarbonate round the bottom edge — which is where a helmet gets chipped on bike racks, car boots and floors.
The description adds the mechanism: the Hardbody shell “extends to the inside of the helmet… fused permanently to the EPS foam liner using our In-Mold process to enhance durability and ventilation without excess bulk”.
The BATFOX and Favoto helmets on this page describe the same in-mold idea in one sentence each; this is the only listing that separates the layers.
“The goal of Giro’s Integrated Mips-equipped helmets is to reduce rotational forces while enhancing fit and comfort by combining the Mips slip plane with the helmet’s adjustable fit system.”
MIPS is a low-friction layer that lets the shell move a few millimeters relative to the head in an angled impact. Integrated MIPS builds that movement into the fit system rather than adding a separate plastic liner, which is why this helmet has no extra yellow shell inside.
The OutdoorMaster helmet on this page also has MIPS, as a separate system, for $59.99 — half the price.
What neither listing does is quantify anything, and nothing on this page assesses how a helmet behaves in a crash.
“All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards.”
Which standards is not said. The Schwinn helmet on this page names CPSC with its extended-head-coverage provision; the Favoto names CPSC, ASTM and CE; the BATFOX names CPSC, ASTM F1447 and CE.
Giro certainly certifies its helmets — a helmet cannot be sold in the United States without CPSC compliance — but this listing does not say so, and a declared marking is the only thing a comparison page can report.
The record for this listing says 671 g (23.7 oz). A medium road helmet weighs nothing like that; the Favoto on this page publishes 260 g (9.2 oz) for itself and the heaviest shipping weight otherwise here is 399 g (14.1 oz).
So 671 g (23.7 oz) is the helmet plus its packaging, and Giro publishes no weight of its own. On a $119.95 helmet whose fit system is advertised as “lighter than comparable systems”, that is a conspicuous omission.
“Active vents in the shell with exhaust channels inside… the most effective cooling system available.”
Internal channelling is a real design: vents alone move air across a shell, channels move it across the scalp. What is missing is the count — Schwinn says 20 or 21, Favoto 26, OutdoorMaster 25, BATFOX 18 — so this is the one helmet here whose ventilation cannot be compared numerically.
No head circumference range — “Medium” with no centimeters, on a shelf whose buying advice is to measure and compare to the range, not the letter — no weight, no standard named, no vent count. Four bullets, all of them about named technologies.
Read on the day this page was built: $120 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-06. The live price is at the top of the page.
| Size | Medium — no circumference range published |
|---|---|
| Shell | Two-piece: hard outer, polycarbonate Hardbody lower wrap, in-molded |
| Rotational protection | Integrated MIPS |
| Fit system | Roc Loc 5 — tension and fore-aft tilt, one-handed |
| Ventilation | Wind Tunnel, with internal exhaust channels |
| Liner | EPS foam, permanently fused |
| Price | $119.95 — the most expensive here |
| Weight | Not published; 671 g (23.7 oz) on the shipping record is the box |
| Safety standard | None named |
| Vent count | Not published |
| Amazon reference | B0GFGKVGY4 |
| EAN | 0199270032344 |
This listing does not say, which is the gap that matters most. The buying advice on this shelf is to measure your head with a tape just above the eyebrows and compare the number to the stated range, not to the letter — and the ranges behind a letter differ: the BATFOX helmet on this page calls 58–61 cm (22.8 to 24 in) "L" and the Favoto calls 58–60 cm (22.8 to 23.6 in) "L". Giro publishes its size chart elsewhere; ask the seller for the centimeter range before ordering.
Where the slip plane lives. MIPS is a low-friction layer that lets the shell move a few millimeters relative to the head in an angled impact. The usual implementation is a separate plastic liner inside the helmet; Integrated MIPS builds that movement into the fit system instead, which removes a layer and, Giro says, improves fit and comfort. Neither this listing nor the OutdoorMaster MIPS helmet on this page quantifies the effect, and nothing on this page assesses crash behavior.
Giro does not say. The 671 g (23.7 oz) on the shipping record is the helmet in its box — no medium road helmet weighs that, and the only self-published weight on this page is the Favoto’s 260 g (9.2 oz). It is a conspicuous omission on a helmet whose fit system is advertised as "lighter than comparable systems", and the kind of figure worth asking a seller for.
A road rider who wants the fit adjusted in two axes and will measure before ordering
Amazon reports what buyers took in the month before this page was last checked: at least 200.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for bike gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
56–59 cm (22 to 23.2 in) · height-adjustable cradle · Multi-Fit light
A touring helmet from an established German sports brand, with a height-adjustable retention cradle, insect mesh in the front vents and a high-mounted integrated light.
Best for: Longer rides where a cradle that adjusts in two axes makes the difference over several hours.
M 54–58, L 58–61, XL 61–63 cm (24 to 24.8 in) · CPSC, ASTM F1447, CE · 18 vents · big visor
A mountain bike helmet in three published size bands, with eighteen channelled vents, a polycarbonate shell fused to EPS and three declared markings.
Best for: A trail rider with a measured head between 54 and 63 cm (24.8 in) who wants the standard named
58–61 cm (22.8 to 24 in) · 6 LEDs, 3 modes · removable visor
A size L helmet for 58–61 cm (22.8 to 24 in) heads with six rear LEDs in three modes, a removable visor and a dial adjuster, supplied with the CR1620 cell already fitted.
Best for: Riders with a larger head who want lighting and a visor without moving up in price.
