Weatherproof Confidence: How KJUS Conquers Rain, Wind, and Snow 

When storm clouds gather across the valley and the temperature drops, this is exactly where KJUS performs best. 

Many ski jackets fail when conditions turn serious. They soak through during heavy precipitation, trap moisture during intense runs, or restrict movement when precision matters most. We engineer our jackets to transform these challenges into advantages, so you stay warm and dry no matter what the mountain throws at you. 

The Science Behind Staying Dry 

At the core of our waterproof ski jackets is advanced multi-layer construction that combines a stretch outer fabric, a Dermizax® waterproof membrane, and body-mapped insulation into one integrated system. 

Here’s how it works: 

• A DWR-treated outer shell deflects rain and snow on contact. 

• The Dermizax® membrane blocks liquid water while allowing moisture vapor to escape. 

• The inner lining wicks perspiration away from your base layer. 

This layered architecture delivers protection and breathability that basic waterproof jackets simply can’t match, keeping you dry whether you’re carving groomers or exploring off-piste terrain. 

Performance Metrics That Matter 

We don’t rely on vague claims. Many KJUS ski jackets feature 20,000mm waterproof / 20,000g/m²/24h breathable Dermizax® fabrics, a performance level trusted by leading alpine shells. 

A 20,000mm waterproof rating means the fabric withstands pressure equivalent to 20 meters of standing water before leaking. Combined with high breathability, fully taped seams, and water-resistant zippers, this construction keeps you comfortable during high-output skiing, heavy snowfall, and prolonged storms. 

These aren’t numbers for a spec sheet, they translate directly to staying warm and dry when weather shifts unexpectedly on the mountain. 

Engineered for Real Mountain Conditions 

Mountain weather is unpredictable, so we design our jackets to adapt. Body-mapped insulation balances warmth and airflow as temperatures change throughout the day. In the Formula Jacket, KJUS FAST Thermo Core™ insulation delivers warmth where you need it most while preserving mobility and breathability. 

Patented AC-Vent™ systems on the forearms allow precise temperature control without removing layers. Adjustable hoods, powder skirts, and sealed construction block wind-driven snow and rain while maintaining full visibility and comfort. 

The Lucas FRX Shell Jacket, developed in collaboration with professional skier Lucas Swieykowski, delivers soft and quiet protection with advanced waterproofing, Hyper 3D Stretch mobility, and adjustable AC-Vent™ ventilation, making it ideal for variable conditions and high output days on the mountain. 

Built for How You Move 

Waterproof protection means nothing if your jacket restricts movement. 

That’s why KJUS ski jackets feature 4-way stretch fabrics throughout the system—shell, lining, and in many styles, even the insulation. Articulated construction and gusseted panels move naturally with your body, whether you’re charging steep lines or executing precise carves. 

Our designs integrate seamlessly with base and mid layers, creating a complete system that manages moisture and warmth from skin to shell. The Formula Series exemplifies this approach, combining ultra-stretch performance with dependable waterproof protection in a refined, athletic fit. 

Why KJUS Outperforms 

For over two decades, we’ve focused on measurable performance, not trends. Our molecular-level fabric engineering delivers higher waterproof ratings, better breathability, and long-lasting reliability season after season. 

From laser-cut seam taping to thoughtfully designed ventilation and hoods that stay in place at speed, every detail reflects our commitment to real mountain performance. These jackets aren’t just technical garments—they’re confidence, engineered. 

The weather won’t wait. Neither should your gear.  Explore our complete collection of men’s and women’s ski jackets and experience waterproof protection designed to perform when it matters most. 

Live Beyond. Above.