As a British brand, we're very used to rain and we certainly know a dark cloud when we see one. Whether you're caught walking in a light shower or stalking in a storm, choosing the right clothing is essential for the sunshine or storm ahead. At Harehill, some of our designs vary from being fully waterproof or water-repellent and there are key differences between the two.

What is Waterproof?

Waterproof fabrics or garments refer to their ability to resist water penetration. In the construction of a garment a waterproof membrane or coating is applied to the shell which adds a robust barrier from water. Additionally, the garment must be constructed with taped seams and waterproof zips (where necessary) to ensure the final product keeps you protected.

How is this Measured?

When shopping for waterproof outdoor clothing you may have come across the term 'Hydrostatic Head' (HH). Hydrostatic Head is the measurement result in mm when the fabric is tested against how much water pressure it can withstand. The higher the rating, the more waterproof the fabric is. Our products are measured using the JIS (Japanese Industrial Standards) test method.

Low rating	Less than 10,000mm
Moderate rating	11,000-15,000mm
High rating	16,000-20,000mm

 

What is DWR (Durable Water Repellent)?

DWR is a chemical finish applied to the fabric which creates a water rebarrier in light rain in order to improve water resistance. DWR, unlike waterproofing, is a temporary treatment that will wash out over time. In heavy rain, water will penetrate the fabric and therefore in heavy storm events it is better to opt for waterproof garments instead. Whilst DWR will provide some protection, eventually it will wear out after continuous use, so in order to refresh your garments and give them longer life we recommended reproofing by applying a water repellent treatment.