This functionally shirt from Columbia is crafted from ultra-light ripstop fabric that helps wick away moisture while shading out the sun to protect the skin from chafing and long-term skin damage. With mesh-lined ventilation in the center of the back of this shirt allows for ultimate cooling and comfort. - Omni-Shade UPF 40 provides maximum protection for long hours in the sun - Omni-Wick technology actively breathes and pulls moisture away from your skin - Antimicrobial treatment protects this shirt from bacterial growth - Built-in tab holders allow you to roll up your sleeves as the weather gets warmer - Hidden horizontal back vents to allow cool air in and out - Modern fit for a easy fit for a comfortable range of motion - Made from 100% polyester ripstop material