When climbing, ski touring, or at full speed, the weather in the mountains can change quickly.Thats when you want a jacket that meets many requirements: they should be light, windproof, breathable, and also water repellent.With the brand new GORE WINDSTOPPER with Light Rain Resistance the textile and membrane specialists GORE have created a material innovation that could solve the problem of space in your backpack.The new products are totally windproof, very breathable, and protect you against light rain.Mammut has recognized the potential of the GORE WINDSTOPPER with Light Rain Resistance material and created the Ultimate Alpine SO Hooded Jacket which should be in every mountain adventurers backpack.