The season for waterproof clothing has begun again. So many raincoats, so many differences, so many things to consider. Time for a deep dive!
What is the water resistance?
What is breathability?
What is the difference between 2, 2.5 or 3 layer jackets?
Table of contents
Waterproof clothing
⛰️ Trail running is all about freedom and adventure, but you can't predict the weather. Rain, wind, and cold can significantly impact your training or race. With the right rain jacket and rain pants, you'll not only stay dry, but also comfortable and safe. Trail.nl you will find an extensive collection of raincoats and rain trousers from top brands such as La Sportiva, Inov-8, NNormal, Compressport, Wise and Instinct TrailIn this blog we explain everything you need to know: from breathability and waterproofness to the difference between 2-, 2.5- and 3-layer constructions, and membranes such as Gore-Tex and Pertex Shield.
Why waterproof clothing is essential 🌧️
Trail running often takes you to places where conditions are unpredictable: hills, forests, mountains, or open plains. A heavy rain shower can soak you in minutes. Without proper protection, you lose heat, which is not only uncomfortable but can also become dangerous on longer runs.
In addition, waterproof clothing is most common ultra trails in the mountains mandatory equipment. Think of iconic events like the UTMB, Lavaredo or the Monte Rosa Ultra. The organization is writing a waterproof rain jacket with taped seams front, and often also rain trousers.
In short: a rain jacket and rain pants are part of the basic equipment of every trail runner.
Waterproofing: dry protection in any rain ☔
Water resistance is expressed in water column (mm).This indicates how much water pressure the fabric can withstand before leakage occurs.
10,000 mm = resistant to light rain and short showers.
20,000 mm or higher = resistant to prolonged and heavy rainfall.
But numbers don't tell the whole story. seams, zippers and DWR coating determine whether a jacket really remains waterproof. Trail.nl you will only find models that are completely taped seams have, so you can hit the road without any worries.
Additional features that support this:
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Ventilation zips (pit zips)
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Mesh pockets which also function as ventilation
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Lightweight fabrics that retain less heat
The difference between 2-, 2.5- and 3-layer jackets👇
| Construction | Construction | Advantages | Disadvantages | Best use |
|---|---|---|---|---|
| 2-layer | Outer fabric + membrane + loose lining | Comfortable, affordable | Heavier, less durable | Daily use, walking |
| 2.5-layer | Outer fabric + membrane + protective coating | Light, compact, ideal as a pack-away | Slightly less sustainable than 3L | Trail running, training, shorter races |
| 3-layer | Outer fabric + membrane + solid inner layer | Durable, wear-resistant, all-round protection | More expensive, sometimes stiffer | Ultratrails, multi-day mountain tours |
👉For most trail runners, 2.5-layer Perfect: light, packable, and sufficiently waterproof for intensive use. For those who often walk in the mountains or go on longer hikes, a 3-layer jacket worth the investment.
Gore-Tex, Pertex& other membranes🔬
Gore-Tex
The most recognized name in waterproof membranes. Thanks to millions of microscopic pores, Gore-Tex keeps rain out while allowing sweat to escape. Variants such as Gore-Tex Paclite are ultra-light and ideal for running, whileGore-Tex Activebreathes even better during high exertion.
Pertex Shield & Shield+
Pertex is known for its light, flexible fabrics. Pertex Shield offers a strong balance between breathability and waterproofness. Shield+ Takes it a step further with improved moisture management and comfort. Perfect for lightweight jackets and trousers.
Own membranes
Brands like Montane, La Sportiva and Inov-8 Sometimes they use their own technology. These are often based on the same principles: a waterproof membrane combined with breathable performance.
To notice & models atTrail.nl 🏷️
BeeTrail.nlYou'll find a carefully curated selection of rain jackets and pants that really work for trail running:
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The Sportiva Known for technical mountaineering apparel, the rain jackets are lightweight, breathable, and suitable for alpine conditions.
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Inov-8 – Developed for downhill and trail running. Their jackets and trousers are packable, extremely lightweight, and meet the mandatory equipment lists for international races.
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Montane – Specialists in ultralight outdoor clothing. Their rain jackets combine Pertex Shield with clever details like ventilation zips and adjustable hoods.
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Compressport – Mainly known for compression clothing, but also lightweight rain jackets aimed at runners.
NNormal Kilian Jornet's brand, which combines sustainability and performance. This is also reflected in their rainwear.
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Instinct Trail Developed by and for ultrarunners, their rain jackets are designed for long races and changeable conditions.
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Wise – Premium brand from France. From ultratrailers for ultratrailers. The best materials for the toughest ultras. Made in Europe.
Rain pants: often forgotten, but crucial 👖
Rain pants may seem unnecessary, but in wet conditions they're essential. They're mandatory for many races, and during training sessions, they prevent cooling.
Features to look out for:
Fully taped seams
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Zippers at the ankles for quick donning and doffing
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Lightweight packability – easy to carry in your racing vest
Bee Trail.nlFind rain pants specifically designed for trail runners: compact, breathable, and durable enough for prolonged rain.
Maintenance: keep your clothes waterproof 🧼
Even the best jacket loses its performance without proper maintenance.
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To wash: use a special membrane detergent.
Impregnate:Re-treat regularly with a DWR spray or wash-in.
Avoid:fabric softener and aggressive agents – they attack the membrane.
Proper maintenance will extend the life of your jacket and keep it optimally waterproof and breathable.
