Idea to improve on the IH Tshirt

Instead of the current normal Tshirts we should be having same grey color tshirt in dry fit cloth with full sleeves so that ppl will wear it in all their fitness avtivities and our main trekker crowd will always be involved in the fitness activities. (e.g. nobody throw the marathon tshirts and always wear on the personal running or gym or other regular activities) which will definitely turns into more publicity n more reach to the public to spread the word of trekking without any extra investment. Would love to discuss on this as there are multiple other ideas in my head to improve the IH experience for the trekkers.