Dynamic Comfort in Every Direction: Experience the Ultimate Flexibility of Four-Way StretchAnti-Microbial Technology That Doesn'T Let Sweat Originated Microbes Grow.Highly Breathable Fabric That Allows Air Flow While You Move, To Control Sweating.This Fabric Does Not Stick To Your Body No Matter How Hot Or Humid It Gets, To Let Air Circulation Continue.Breathe freely in our Men's Gym Vest featuring VENTMESH for highly breathable comfort.