Igloos Men's Softshell Fleece Earband Shell: 95% Polyester/5% Spandex Stretch Fleece, 1-side brushed, 1-side anti-pill 284gsm (domestic 58085), Lining: 100% Polyester Odor-X anti-microbial Imported Soft-shell Ear band Comparable to North Face Fabric Odor-XCHANGE anti-microbial lining - That inhibits the bacteria that emits odor, while allowing excess heat and moisture vapors to escape