Effective - Worked well in the Arctic Circle (Tromso, Norway) while on speed boats during Whale watching. Wore on boat that was moving at a pretty fast clip ( 25 mph) in the open air with below freezing temps. NOTE - you will have some condensation form under it where your mouth / nose are -- but that is going to happen with all items at this price point.
Rating: [4 of 5 Stars!]