"What Our Gearhead® Experts Are Saying:""I've been wearing the Infinity Light 1/2-Zip Top on early morning runs when the temperature hasn't decided what it wants to do yet. The brushed interior feels great against the skin right from the start, and the half-zip gives me enough ventilation to keep from overheating once I'm moving.""That in-between weather window, cold enough to need a layer but warm enough that a heavy jacket becomes a liability, is exactly where the Infinity Light 1/2-Zip Top earns its place. Swix built this midlayer around a soft brushed interior that feels comfortable from the first moment you pull it on, and the quick-drying Repreve polyester fabric means it handles sweat and keeps moving without weighing you down or clinging uncomfortably mid-effort. The half-zip gives you straightforward temperature control on the go, and the chin guard means you can zip it all the way up without any irritation when the wind picks up. Whether it is your first layer on a cold training run or your go-to piece for morning coffee before a big day outside, this top moves easily between effort and ease."