GORE-TEX® - GORE-TEX® fabric is incredibly durable, waterproof, breathable, and totally windproof. A single square inch of this fabric contains 9 billion microscopic pores—each 20,000 times smaller than a raindrop, but 700 times larger than a molecule of water vapor. Water can’t pass through the fabric, yet perspiration escapes with ease. You’ll find this next level molecular construction on all GORE-TEX® fabrics.