Buy, wear, share and start your own conversation with our science-based 100% silk, 58" (regulars) or 62" (extra-longs). ( XLs are very limited in inventory. Hesitate and you may be lost!) Our showroom collection includes ties ranging from Antibodies to ZZZ's, with Avian Flu, Climate Change, Ebola, Neurons, West Nile and SARS along the way. All neckties feature an informative "learning note" of the reverse side, explaining the design and providing the source citation of the primary microscopic images. Click the thumbnails for more info and descriptions.