Breeze Dry-Tec is an innovative new MontBell waterproof/breathable
material, and one of the only air-permeable waterproof fabrics available
Waterproof/breathable materials generally consist of a micro-porous laminate
with a non-porous polyurethane coating. This means that all vapors that will
pass through the fabric must first be absorbed by and passed through the polyurethane
coating and then through the micro-porous laminate and out of the jacket.
With Breeze Dry-Tec, MontBell was able to manipulate the size and consistency
of the pores, eliminating the non-porous coating and drastically increase the
ventilation of the material.
In fact, tests indicate that Breeze Dry-Tec is more than twice as breathable
as many of its competitors while maintaining a high level of weatherproofing.