bike helmets are single impact use only, even if you don't see cracks after a crash, there's probably structural damage to the foam. also, the foam supposedly degrades from uv rays and sweat, so it should be replaced ever 3-5 years.

Irok the Bern Brentwood. Its too hot for summer use. Fancy for teh winterz.

SixSixOne Dirt lid is one that I have. It's nice and the stickers come off.