What are the options? I see that fogging up glasses are the biggest complaint for many.

I've tried a Columbia freeze one and a cabelas guidewear neck tube, the cabelas does better at not breathing up into the glasses but I'd like to hear more options/reviews.

My main concern is fogging glasses, besides the neck protection.

I have the simms sun armor buff and it has extended flaps front/rear that you can tuck into your shirt that help protect the neck. It also has a vented mouth area that helps but it still fogs up when you wear it over your nose. I dont wear it over my nose I just put sunblock on my nose and wear a full brim columbia hat.

Thanks for the recommendation, I'll check them and their gaiters out too

i have a simms neck gaiter. it works well if I wear it correctly. When i dont it fogs my sunglases. if i breath thru the mouth it also fogs. other than that is perfect for protecting me from the sun and all of that. 

buff