The Solstice is the go-to entry level adult helmet. Easily adjustable straps and a retention system allow one size to fit most riders. A visor keeps out the sun and can be easily removed and reattached.
It seems that everyone who tries on this helmet finds it comfortable. The Teramo is a great bang for the buck helmet that is lightweight, well ventilated and stylish.
Louis Garneau has built a reputation on the safety features of their helmets. Amongst other safety features, an internal skeleton gives strength to the helmet to allow for maximum ventilation. The Quartz is a popular choice due to its low profile shape and accommodating fit.