Multifunctional jacket for year round hiking: The Men's Topaz Jacket is one of Jack Wolfskin's most popular waterproof hiking jackets. It provides reliable protection from wind and rain. The soft outer fabric and comfortable mesh lining make it a pleasure to wear, even if the weather turns bad while you're out on the trail. And the System Zip means you can 'winterise' the jacket with an insulated inner garment. Simply zip in a compatible inner jacket for the required insulation.