The S1-J is the garment which single-handedly put this brand on the map and has kept it there ever since. The S1-J has a sleek minimalist appeal on the outside, but don't be fooled into thinking any aspect of this garment is simple. In fact it's one of our most technical when you factor in all that it is: windproof, waterproof, shockingly breathable, and lined with an active climate membrane which opens when it gets hot to ventilate and constricts when it gets cold to keep heat in. We call it smart fabric. We pay an arm and leg to make it, but it is worth every penny and more for this kind of performance. The S1-J offers legitimate protection in all seasons, looks stellar on or off the bike, and with simple care can easily last 10+ years. It has even been ridden in multiple stages the Giro d'italia. We have no problem saying The S1-J is one of the most sublime, durable, all-weather jacket on the market today. A tailored fit, total protection from the elements in all seasons, and the best waterproof zippers and components available in the world today make the S1-J Riding Jacket the pride of our collection and a game-changing garment for cyclists around the world. Durability: Ultra High Fabric: Synthetic Blend with an Active Climate Membrane for all season performance. Care: Easy Fit: Athletic / True to Size Best For: All riding in all seasons. Temperature Range: 30'F-65'F