Features of the Castelli Men's Alpha ROS Jacket Rain or shine engineering provides Insulation and breathability for cold and dry rides, with effective waterproofing for wet rides Gore Windstopper 150 LRR fabric provides wind protection with High breathability and effective rain protection Seam sealing on shoulders, reduced seaming and double stitching keep you mostly dry Alpha construction separates wind/water protection layer from insulating layer Better ventilation and better moisture evaporation thanks to separate insulating layer Partially covered waterproof YKK vislon zipper slides easily and lies flat Raw-edge waist lies flat and moves with you Raw-edge wrist cuffs lie flat for a perfect interface with gloves Stretch fabrics with advanced patterning make for an excellent close-to-body Fit that still accommodates a wide range of body types Back ventilation Castelli silicone text gripper at waist keeps jacket from riding up 3 Rear pockets with reflective laser-cut drain holes Extra pocket with waterproof zip