AQUA Cell Membrane
The secret of HKSDK safety boots which are both completely waterproof, windproof and breathable at the same time – lies within our own patented bi-component membrane – AQUA-CELL®. This membrane contains over 9 billion microscopic pores which are approximately 21,000 times smaller than a drop of water, but 750 times bigger than a molecule of moisture vapor. So while water in its liquid form cannot penetrate the membrane, as moisture vapor it can easily escape.
All HKSDK styles made with AQUA-CELL® membrane are guaranteed to be 100% waterproof, windproof and breathable so you can be sure to remain dry and comfortable at all times.