Fashion News & Trends: Form and functionality have never been as vital to a fashion designer's work as it is to the clothing designed by Miguel Caballero. Actually, the functionality part is most important to Caballero's clients, because if tested, it could turn out be a matter of life or death for them. This is not about missing out on the dernier cri and being cited by the fashion police for wearing the "was" suit to the "it" event.