You know the weather looks unpredictable, but the longer you sit inside looking out the windows, the more ride time you're wasting. Shoulder season cycling, or even summer riding in the mountains, is often rife with days of fast moving storms and pop up showers. You've about had it with long winter afternoons spent on the trainer though, so you'd rather brave the elements than bail on a ride outside. Fortunately, gear like Mavic's Ksyrium Pro Vest won't weigh you down stuffed in a saddle pack or jersey pocket when the sun is shining, and the vest's Warm Shell Rain ST fabric will block wind and rain to keep you cool and dry when the weather takes a turn. Whether you're on a gusty summit or caught in a brief shower, the vest's streamlined fit and stretchy inserts allow you to throw it on quickly, and it features two pockets to store essentials you want to keep relatively dry and protected. Mavic purposefully designed the zipper to sit off center to allow you to tug it open or closed with one hand, and it added reflective accents to keep you visible to other road users on dim, overcast days, as well as a gripped Exo Grip band of elastic to hold the bottom hem of the vest securely in place.