Not all "waterproof"clothing is made equal. There are massive variations, and in extreme conditions, it could be the difference between life and death.

To discover just how significant these ranges are we've been allowed behind the scenes at the Gore-Tex facility outside Munich in Germany.

We join Sporting Shooter Magazine editor, Dom Holtam, who has to face the "storm cube" and "rain tower" before heading out into field-test a Harkila hunting suit in a snowy, wet, German forest.

This item first appeared in Fieldsports Britain episode 212 http://www.youtube.com/show/fieldsportsbritain

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