The Atomic Four Amid is a lightweight protective helmet built around an In-Mold Shell design and featuring built-in ventilation. Weighing just 0.39 kg, it avoids unnecessary bulk while still offering reliable impact protection.
The In-Mold Shell construction fuses the outer shell with the foam liner for a sturdy yet minimal build, helping to keep overall weight low. Ventilation channels allow air to flow through the helmet, reducing heat and moisture buildup during activity. It does not include MIPS—an added rotational impact system—so the focus remains on simplicity and low weight rather than that specific protective technology.