This new season Primaloft Mixed Media Jacket from Callaway is pure class from the inside out. As the mixed media name suggests, the jacket is made to the optimal construction through the 100% Nylon woven fabric with a water-resistant polyester finish & nylon/spandex knit fabric. The Jacket features 60gsm Thermal Primaloft insulation, Primaloft is one of the most highly regarded & advanced filling brands in the world today.