How waterproof a jacket is will depend on its waterproof rating. The higher a jacket’s waterproof rating, the longer the fabric will remain waterproof for.
| Rating | Resistance | Weather |
| 0 – 1,500mm | Water resistant / Snowproof | Very light rain |
| 1,500mm – 5,000mm | Waterproof | Light to average rain |
| 5,000mm | Very Waterproof | Moderate to heavy rain |
| 10,000mm – 20,000mm | Highly Waterproof | Heavy rain |
A rating of 5,000mm to 10,000mm is suitable for just about all weather conditions but equally at home in lesser ones, great for a Sunday stroll or a serious trek in bad conditions. These higher rated jackets will also be breathable.