Do you like technical progression and finding the limit? Is your shirt technical enough to handle your ambitions? The Topo Designs Tech Long-Sleeve Shirt is. Constructed with all the bells and whistles you'd want from a shirt made to go the distance and then some, it's also built on a solid foundation of lightweight ripstop nylon and finished with a durable water repellent treatment for added weather resistance should you be surprised by light precipitation or spills.