Which water column of jackets 3000 5000 or 8000 mm Sep 11 2019· Softshell jackets with the DryTech coating include a high quality polyurethane layer with a microporous structure applied directly on the fabric It prevents penetration of water and at the same time allows for evaporation of body moisture Clothing with the membrane Aqua Pro is also rainproof and breathable but differs in the method of application The membrane is a special layer that is