Not having buttons or velcro on the waist will be so comfortable

EPP (for slow speed impacts) and EPS (for high-speed impacts) in one sleek package

A3 Helmet W/MIPS

while laser-perforated ventilation increases airflow to keep you cool

D4 Polyacrylite Helmet W/MIPS Roamer Clay Product Style_Badge Not having buttons or velcroThe reigning king of full face helmets, the D4 range expands with a Polyacrylite model packing the same safety and comfort features as the premium carbon and composite models into a price conscious shell. Details make the D4 the most coveted full face in mountain biking, including Mips C2 brain protection, an air intake system for ventilation, and an unmatched anatomical fit.