Cold out? Don't miss a run with this warm half zip. rulu™ Stretchy, naturally breathable Rulu™ fabric is sweat-wicking and buttery soft four-way stretch sweat-wicking buttery-soft handfeel naturally breathable features Designed for: Run Lycra®: Added Lycra® fibre for shape retention Mobility: Underarm gusset for greater mobility Thumbholes and cuffins™: Help keep sleeves down and hands warm Zippered pocket: Stash your stuff in this discreet seam pocket Shine-bright : Reflective detail helps keep you on the radar in low light Tight fit: Tight fit, cropped length