The thing is that this helmet has so much bigger holes, it would be easy for a "stinger" to get inside. Murphy's law would happen to be me with the bug issue. So I prefer to at least avoid this. The net fits very well in the helmet. It covers the front and sides of the helmet. The back remains opened. From those who have experience with net, they told me it does not affect venting. I'll know next summer when I try the helmet. For now, it is stored and I will use a "warmer" one as the temperature is too cold to ride with such helmet. I don't want to have to buy the shell that goes over the helmet. My Aspire can do the job under cooler weather. But boy this Catlike is so light. Unbelievable.