The waterproofness of a jacket is measured in millimeters (mm) and indicates the fabric's ability to resist water penetration. For advanced skiers, a jacket with a minimum of 20,000 mm is recommended to cope with extreme conditions. At the same time, breathability, expressed in grams (g/m²/24h), is just as crucial. It enables perspiration to be wicked away, keeping you dry even during intense exertion. Breathability of at least 20,000 g is ideal.
Insulation can be provided by synthetic materials or down. Down jackets offer an excellent warmth-to-weight ratio, but perform less well in wet conditions. Synthetic insulations, on the other hand, retain their insulating capacity even when wet, and dry quickly. Your choice will depend on your sensitivity to the cold and the humidity generally encountered in your skiing environment.
A ski jacket for advanced athletes should offer excellent mobility. Look for models with ergonomic cuts, stretch inserts and pre-shaped articulations. The cut should also be adapted to your morphology so as not to impede your movements while avoiding snow ingress.
For maximum protection, the jacket's seams must be fully sealed. Zippers must also be waterproof to prevent water from seeping in during heavy snowfall or contact with snow.
Ventilation zips under the arms or in the torso help regulate body temperature and increase comfort during sustained effort or ascent.
Pockets must be accessible, even with a harness or backpack. Details such as a ski pass pocket, a secure inner pocket for electronic devices and a removable snow skirt are assets for the advanced skier.
Alpine ski jackets are often more structured and designed for speed and aerodynamics. Freeride models, on the other hand, are generally more robust and offer greater freedom of movement, adapted to varied terrain and changing conditions.
For ski touring and ski mountaineering, the jacket's weight and compactness are crucial. Opt for lightweight, easily compressible models that can be stored in a backpack without taking up too much space.
Choosing the right ski jacket is a balance between protection, functionality and comfort. Take into account your level of activity, the weather conditions you'll be facing and your personal preferences in terms of fit and style. A well-chosen jacket is an investment that enhances not only your performance but also your overall experience on the slopes.
Investing in a high-quality jacket is essential for any advanced skier who wants to maximize their potential while remaining protected from the elements. By following these tips, you'll be well equipped to make the best choice for your specific needs.