One Size Fits Most: Small — XL. Seamless Technology – Bonded Synthetic for a Seamless Feel. Premium Japanese Synthetic Material – Great Feel, Flexibility, and Increased Durability. 4-way Stretch Synthetic on Stretch Points – Advanced Performance: Moisture-wicking, Breathability, and Flexibility. Opti Fit™ Adjustable Closure – Thin, Light and Secure Fit. Stretch Binding Cuff – Secure Feel and Moisture Absorption.