{"id":38225,"date":"2017-01-09T10:09:51","date_gmt":"2017-01-09T08:09:51","guid":{"rendered":"https:\/\/test-01.bergfreunde.de\/blog\/a-buyers-guide-to-softshell-membranes\/"},"modified":"2022-03-08T14:24:21","modified_gmt":"2022-03-08T12:24:21","slug":"a-buyers-guide-to-softshell-membranes","status":"publish","type":"post","link":"https:\/\/www.alpinetrek.co.uk\/blog\/a-buyers-guide-to-softshell-membranes\/","title":{"rendered":"A buyer’s guide to softshell membranes"},"content":{"rendered":"
\"climber<\/a>
A softshell in action (Source: TNF)<\/figcaption><\/figure>\n

It\u2019s an irritating topic \u2013 you wander through the vastness of softshells and the more you familiarise yourself with all the technical stuff, the deeper you delve into the world of confusing details. Leading the pack \u2013 the membrane.<\/p>\n

In the product descriptions, you always stumble upon terms such as Polartec, Apex, Windstopper<\/a>, M1, etc. Even more confusing are values like MVTR, RET and hydrostatic head. Luckily, we\u2019re going to shed some light on the dark maze of details.<\/p>\n

Breathability – g\/m\u00b2\/24h or m\u00b2Pa\/W?<\/h2>\n

First, a little digression on a topic there\u2019s no way around, even when it comes to softshell jackets<\/a> \u2013 the breathability of the fabric. Breathability describes the ability of a fabric to allow moisture vapour to be transmitted from the inside to the outside of the jacket. Unfortunately, this is not at all easy to measure, as we have two different values:<\/p>\n

The MVTR (Moisture Vapor Transmission Rate)<\/h3>\n

This is the measure of how much water vapour can pass through a square metre of a membrane within 24 hours. Accordingly, the rule is as follows: the greater the MVTR<\/strong> is, the higher the breathability. The best rate is approximately 40,000g\/m\u00b2\/24h \u2013 meaning 40,000g of moisture vapour per square metre per 24 hours. A membrane with an MVTR of 10,000g\/m\u00b2\/24h is considered to be very breathable<\/strong>. However, the problem with this is the sheer number of different methods for measuring the MVTR, namely around 30, which can in turn lead to different results. For example, the clothing company Patagonia<\/a> had the breathability of its products tested by six different labs a few years ago and received a total of 6 different ratings.<\/p>\n

The RET value<\/h3>\n

The RET (Resistance to Evaporating Heat Transfer) value determines the resistance<\/strong> that a material has to water vapour. In contrast to the MVTR, the lower the RET value is, the higher the breathability. This basically means that an RET value of 0-6 is very good, 6-13 good, and 13-20 satisfactory and anything less than 20 is unsatisfactory.<\/p>\n

To be or not to be waterproof<\/h3>\n

What good is extreme breathability if more water permeates the inside than can be transmitted to the outside? Good news: almost all of today\u2019s membranes provide sufficient protection. According to the European DIN EN 343:2010-05 (Protective clothing \u2013 Protection against rain), a product with a hydrostatic head of over 800mm is \u201cwaterproof (Class 2)\u201d and over 1300mm \u201cwaterproof (Class 3)\u201d. However, in heavy rains or when sitting on a wet surface, neither is sufficient. That\u2019s why most manufacturers offer fabrics with a higher hydrostatic head of up to 20,000mm.<\/p>\n

The membrane \u2013 windproof or waterproof?<\/h2>\n

Yet another stumbling block in our way: there are two kinds of softshell membranes: the first keeps the wind out and protects your body from overcooling, whilst the other protects you in wet conditions. Here\u2019s a brief overview:<\/p>\n

Waterproof membranes<\/h3>\n
\"The<\/a>
The construction of a softshell membrane (Source: Arc’teryx<\/a>)<\/figcaption><\/figure>\n

Many manufacturers, such as Arc\u2019teryx<\/a> rely upon Gore softshell membranes, which reliably keep wind and water out of the jacket\u2019s interior and have good breathability (RET <13). In addition, there are other membranes, some of which developed by the clothing companies themselves, that work just as well as the market leaders:<\/p>\n