The Rdiner Heavy Flow series uses a multi-layer synthetic composite for professional-grade fluid retention. The inner moisture-wicking knit is designed to condition the skin surface by pulling fluid toward the high-density microfiber core. The outer shell consists of a TPU laminated fabric that provides leakproof tension through a physical barrier.
This construction is optimized for volume retention during overnight use. Data points highlight the importance of pre-rinsing in cold water and avoiding softeners to maintain the fiber's wicking efficiency and prevent pH disruption.