OutdoorMaster Gem MIPS
Top PickWhat We Like
- MIPS liner at a midrange price
- Two liner thicknesses plus a dial
- 25 vents for a warm commute
- Removable visor and washable padding
Worth Noting
- No built-in light or reflective detail
- Vents
- 25
- Weight
- 14.1 oz
- Fit System
- Dial with two liner thicknesses
- Rotational Protection
- MIPS
Read the full review
Rotational protection is the decision that separates the helmets in this group, and the Gem is the one that makes MIPS part of a normal commuting budget. The liner is designed to shear a few millimeters against your head in an angled impact — the kind of fall you are most likely to take on pavement. Around it sits a polycarbonate shell over EPS foam, 25 vents, and a removable visor.
Two liner thicknesses, 0.23 and 0.31 inch, sit under the dial, and that pairing is what sold us. Most helmets give you a single shell and let the dial do everything; here you can change how deep the helmet sits on your head before you touch the tension at all. Start with the thick liner, drop to the thin one if the shell rides high, and there is room to run a thin cap underneath when the weather turns.
Weight is the number worth knowing: 14.08 ounces is not the featherweight those 25 vents suggest, and you notice it on a long climb more than on a flat commute where the motor is helping. That is the price of the liner, the second set of pads and the visor, and it is a trade we will take. The vents still earn their keep — this is a helmet that stays dry on a warm ride rather than one you peel off at the lights.
Bottom line: The e-bike helmet we recommend to most riders: MIPS protection, 25 vents and a two-liner fit system, for less than the premium shells in this group.