The Iride (say: ir'-e-day) Seamless SS Base Layer is the softest and most low-profile base layer Castelli produces. It feels like you're wearing cashmere that melts to your skin. This is a byproduct of to combination of Castelli's state-of-the-art seamless knitting technology and super soft fibers. Beyond comfort, the high-tech texturized polypropylene fibers do an excellent job and wicking moisture and keeping you dry.
Castelli optimizes moisture transport by using a proprietary polyproleyne-Lycra blend fabric. Polypropylene is a proven fabric for quickly transporting moisture away from your skin and keeping you dry . Once the moisture has reached this point, the Iride's Lycra nylon layer then transfers the moisture outward to the surface of the garment to evaporate.