Navy fleece vest with a zipper for a comfortable fit. - Brand: patagonia - Color: Navy - Material: Fleece - Style: Vest - Features: Zipper - Design: Solid PEF is an abbreviation for "Performance Enhancement Film." Performance Enhancement Film refers to a film material that has been given or improved with specific functions and performance compared to standard film materials. Depending on the application and purpose, the following performance characteristics are enhanced: • Improved durability: Increases tensile strength and abrasion resistance, making it less prone to tearing • Heat resistance and weather resistance: Resistant to high-temperature environments and ultraviolet rays, suitable for outdoor use • Waterproofing and moisture resistance: Prevents the entry of water and moisture • Light shielding, heat shielding, and insulation performance: Suppresses the transmission of light and heat • Added functions: Antistatic, antibacterial, stain-resistant, gas barrier properties, etc.