Received my set of 5 on Monday and used them on Wednesday to clear down fallen trees. It was 85 degrees with high humidity and because of the rain we had mosquitoes, deer flies and even funny horseflies. I wore it under a helmet and headphones. The bugs were so bad they could be heard buzzing every time I turned off the saw, but didn't get bitten all day. She covered her neck and face and wiped the sweat from her ears. They were a little heavier than I expected but worked great. They also held in place very well. This will be a great addition to my hunting gear this fall!