? ATTENTION: PLEASE REFER TO THE SIZE CHART IN THE PICTURES FOR A PERFECT FIT! THESE TOPS RUN DIFFERENTLY THAN OTHER BRANDS! Please measure your chest size. ULTIMATE COOL: Made of super-light nylon/spandex, your SLS3 Tri-Jersey wicks sweat, then evaporates it FAST, to keep you cool & dry. Even has mesh shoulder inserts for added ventilation. This top is very comfortable in a hot race conditions. POCKETS: Thanks to our 3 back pockets (which are hard to find in tri tops ), your nourishment is always handy. Reach from either side to grab your energy gels, bars & chews. COMFORT: The silicone gripper on the bottom of the jersey keeps it in place even in the aero position on the bike. No chaffing, no hot spots. This tri top goes well with our FX Triathlon Shorts. FULL FRONT ZIP: Race heating up? Breathe easy. Just open the zipper to let in cooling airflow. Chill in the air? Pull the zip back up & lock it down in its zipper garage.