What are the most effective quick-dry materials being used in MTB apparel that not only provide exceptional moisture-wicking properties but also offer superior durability and resistance to abrasion, while minimizing weight and maximizing comfort? Are there any innovative textiles or treatments on the horizon that could potentially revolutionize the industry, and if so, what benefits can we expect to see in terms of performance and functionality? Additionally, how do different quick-dry materials interact with various body types and riding styles, and what considerations should manufacturers take into account when designing and engineering their apparel to cater to a diverse range of riders? Ultimately, whats the holy grail of quick-dry materials for MTB apparel, and how close are we to achieving it?