View all Mens eVent Waterproof products here. View all Womens eVent Waterproof products here. The versatile 2, 2. This highly breathable performance combined with a durably waterproof 3-layer construction produces Hydrostatic head ratings of 20,mm. View all Mens Pertex Waterproof products here. View all Womens Pertex Waterproof products here. Polartec NeoShell is an engineering breakthrough for waterproof breathable fabric technologies.
Dynamic air exchange at the surface provides the unrivaled ability to stop water and wind permeation without restricting the release of excess body heat and moisture vapor. Polartec NeoShell has a Hydrostatic Head rating of 10,mm.
This is lower compared to other fabrics as NeoShell focuses on being as breathable as possible. View all Mens NeoShell Waterproof products here. View all Womens NeoShell Waterproof products here. A lot of brands buy and produce waterproof fabrics that don't come under any of the brands mentioned so far. You could learn the difference between a mm and a 5,mm Hydrostatic Head rating through firsthand experience like this guy is, or just keep reading here and find out the much easier way….
One of the coolest things about working at ACK is getting to research everything and anything about the gear we carry. Here are the three facts you should know about the Hydrostatic Head rating system:. Hydrostatic Head is a method of measuring how waterproof an article of fabric is.
Manufacturers take a clear cylinder and securely clamp their material on the bottom end. The cylinder is then slowly filled with water and observed to determine the maximum height of the water within the cylinder before water seeps through the material. The process kind of looks like those paper towel absorbency tests you see in commercials where they dump water over the towels to see which holds up longer — just with all the water contained in a tube rather than over a bowl.
Understanding what is the threshold for a good hydrostatic head can be really helpful in the decision-making process. Unfortunately for specification geeks, Goretex does not use HH ratings for any of their fabrics. Well, they have a state-of-the-art testing facility where they run their own waterproof experiments to ensure they have the best performance in the industry. Their rigorous testing includes three different stages to ensure that their technology performs better than their competitors.
These stages include lab testing materials, human testing, and in-the-field testing which are different for garments, footwear, and gloves. They are meant to simulate real-life conditions and not just support a column of water for a sustained time period. Using sophisticated rain and wind simulations, Goretex products are tested after completion to ensure that the seams and zips are just as waterproof as the fabric. EVent Fabrics have 3 adaptions of their signature material which have HH ratings of 10, mm, 20, mm, and 30, mm.
Their most waterproof variation is the Expedition however this is also their least breathable. As you can see below, the breathability of eVent Fabric directly correlates with the HH ratings and the more waterproof the material is, the less breathable it becomes. We compare eVent Vs Goretex performance here. Established in , Pertex has a fairly large range of fabrics and lots of experience when it comes to waterproof material.
They have their original Sheild waterproof fabric and then a growing number of variations offering varying degrees of water resistance. Pertex is thought to be more breathable than Goretex and is also incredibly lightweight. Here are some frequently asked questions about hydrostatic head ratings. A tent with a HH rating of mm will keep you dry in most rain showers however you may notice that in heavy downpours, small droplets of water begin to get through and drip down.
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