When your waterproof/breathable apparel gets dirty this attracts water and you'll find your garment wetting out. When this happens, breathability is significantly compromised.  Tech Wash leaves no hydrophilic residues so cleans your garment and restores the Durable Water Repellency finish. (If you find that your clean garment is still wetting out, treat with TX-Direct.) Use 100ml of Tech Wash (150ml in hard water areas) and don't put more than 2 garments into your machine at one time. Wash according to care label.