Advanced Rain Jackets and the GORE-TEX Controversy

Introduction

• Discussion about an advanced rain jacket design.
• Mention of a major flaw in modern rain gear and how GORE-TEX is a scam.

Background on GORE-TEX

• Discovered by Bob Gore in 1969 while working at DuPont.
• Developed from polyfluorinated chemicals (PFCs) also used in Teflon.
• PFCs are harmful to the environment and human health.
• DuPont was sued for covering up the dangers of fluorinated chemicals.

GORE-TEX Material Properties

• GORE-TEX is a membrane with microscopic pores: large enough for vapor, small enough to block water.
• Marketed as the ultimate breathable waterproof fabric.
• GORE-TEX jackets have a high hydrostatic head rating, around 20,000 mm.

The Main Issue with GORE-TEX

• GORE-TEX can be waterproof and breathable, but not simultaneously.
• Breathability is compromised when the outer fabric layer absorbs water.
• Vapor cannot escape if the outer fabric is saturated, causing condensation inside the jacket.
• Jackets are treated with DWR (durable water repellent) finishes to prevent water absorption.
• DWR is not durable and needs reapplication.
• When DWR fails, the jacket