If the helmet fits as it should, you should feel the cushions against your cheeks. ... If the helmet's a little on the tight side, keep in mind that most helmet liners break in 15 percent to 20 percent after the first 15 to 20 hours of riding. Wear the helmet a while to see if any pressure points develop.
Do motorcycle helmets loosen over time?
A helmet can loosen by up to 20% after just 15-20 hours of wear. As a motorcycle helmet is worn, its inner padding loses form from heat/cold, friction, and degradation. Over time, as the pads degrade thinner, the helmet loosens.
Will a new helmet loosen up?
While your helmet should fit firmly, it is important to remember that a helmet generally loosens up after being used for a while. The comfort liner gets easily compressed with frequent wear. Your new helmet should fit a little tightly. However, ensure that the snugness isn't uncomfortable.