Dynafit says about the Vertical Tank
The sleeveless Vertical Shirt has been developed just for high-intensity, sweat-inducing activities on the mountain and is perfectly suited for steep mountain running and hot temperatures thanks to its extremely airy Micro-Mesh fabric. The shirt at only 80 grams has been made with flat seams for the highest comfort. WIth its quick-drying materials and odor-resistant fabric, mountain and trail runners can keep the shirt on until the entire run is over.