Vortex Total Ascent Performance Cap - Men's Black OSFM. An unstructured build makes for a more relaxed look and a metal buckle and tuck-in closure in back mean you get a custom fit. Specifications for Vortex Total Ascent Performance Cap - Men's: Manufacturer: Vortex Gender: Male Age Group: Adults Hat Size US: One Size Hat Style: Cap Color: Black Application: Outdoor Fabric/Material: 100percent Polyester Package Contents: Vortex Total Ascent Performance Cap - Men's Vortex 222-20-BLK: Total Ascent Performance Cap - Men's Black OSFM