When you wear a balaclava, there is a risk that earmuffs do not sit tightly enough around the ears, allowing in noise and the risk of damaged hearing.
Research shows that the locations of seams, zippers, buttons, and folds on the balaclava also affect noise leakage. With the Spirit Windproof Balaclava, we have taken this very seriously.
In studies performed by SINTEF, the Spirit Windproof Balaclava is clearly the best of the four balaclava models that were all tested with Peltor Optime III earmuffs. The worst-performing balaclava gave 10 dB suppression in the frequency range of 0.5 to 8 kHz, while the Spirit Windproof Balaclava gave 30 dB suppression in the same frequency range, which is a considerably better result.
The Spirit Windproof Balaclava is part of the Spacer intermediate layer series, which complements the Pyrad collection from Wenaas.