"Here is an interesting accesory from HSU, name Windsalyer, a specialized foam that goes around your GoPro and blocks the wind noise. To actually test this I have waited for a windy day and also compared it with no foam, in camera wind noise reduction and against the Media Mod mic with its own foam. The results are interesting and rather easy to discerne, yet here are my conculsions:
1) No foam, no wind reduction - wind very noisy
2) Noise reduction enabled - muffled voice, still has wind noise
3) Media mod + foam - very muffled voice, low wind noise
4) HSU Windslayer - clear voice, minimal perceptible wind noise"