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3 Peaks Cycles Waterproof and Breathability Ratings


If you’re heading out on the bike, especially in the UK, waterproof gear is essential. Outdoor weather can be unpredictable, especially in the mountains. Waterproof and breathable fabrics keep you dry and comfortable. The more

So, what is waterproofing, and what do the numbers mean? 5K/5K for example.

  • 5,000mm: This is the minimum rating for a jacket or trousers to be called waterproofproof, however, they won' stand up to much more than a light shower.
  • 10,000mm – 15,000mm: A waterproof garment in this range will withstand most downpours as well as heavy snow, but will soak through over time if subjected to pressure, such as crashing in wet snow, kneeling or sitting down, or a heavy pack.
  • 20,000mm and Up: This is the rating you should look for if you plan to be out in all conditions carrying a heavy load.

Breathability Ratings:

  • 5,000 – 10,000g/m²: This level of breathability is fine for basic leisure cycling, urban travel or camping in the rain, but will get a bit clammy during high-intensity cycling.
  • 10,000 – 15,000g/m²: Jackets in this range are suited to more adventurous Mountain or Gravel cycling.
  • 15,000 – 20,000g/m² & above: An extended trip to the hills, cycling in warm climates or otherwise working hard and perspiring heavily will require a jacket this breathable.

Please have this information in mind when buying your next waterproof clothing. If you have any questions please feel free to give our friendly team a call on (01729) 824232