Kryptek Arma Tech 1/2 Zip Shirt - Men's ALTITUDE M. Made with a Polyester face for moisture wicking and quick dry time and a merino wool backer for temperature regulation through a complete range of environments. By combining polyester and merino wool this gives the fabric more strength more stretch and a smoother finish resulting in an incredibly comfortable next to skin layer. Combine this base layer with the mid-weight Arma Fleece 1/2 ZIP or the Arma Hoodie for maximum performance. SILVADUR antimicrobial technology inhibits bacteria growth and buildup of microbes on fabric surfaces. These microbes often destroy fabric integrity shorten its useful life and can cause discoloration spoiling and staining. SILVADUR polymer-containing silver technology releases silver ions to neutralize odor-causing bacteria upon contact with your clothing. SILVADUR ensures fabrics stay fresh without affecting the fit feel or finish of the treated garment. HOW IT WORKS - Silver contains inherent antimicrobial properties. It has been a time-tested antimicrobial used since ancient times in healthcare food preservation and water treatment as well as other applications where effective long-term bacterial protection is required. Silver is a leading antimicrobial due to its safety for human contact long term efficacy and prevention of growth for a broad range of microorganisms. HOMOGENEOUS FINISH - SILVADUR antimicrobial technology provides uniform distribution of silver ions throughout the fabric ensuring comprehensive protection and long-lasting freshness. RESISTS YELLOWING - Fabrics treated with SILVADUR antimicrobial technology will not fade or yellow over time. NO LEACHING - SILVADUR long lasting antimicrobial wont ever cross the skin barrier or migrate from the fabric. This means that SILVADUR antimicrobial wont impact the micro-flora or good bacteria when in contact with skin. Specifications for Kryptek Arma Tech 1/2 Zip Shirt - Men's: Manufacturer: Kryptek Age Group: Adults Apparel Fit: Regular Gender: Male Color: Altitude Application: Outdoor Fabric/Material: 91percent Polyester 9percent Merino Wool Features of Kryptek Arma Tech 1/2 Zip Shirt - Men's Silvadur Antimicrobial Technology Highly Breathable Bicep Pocket 4-Way Stretch Comfort Fabric 1/2 Zip For Thermal Regulation Athletically Cut And Anatomically Shaped For Movement Moisture Wicking Fabric Designed To Be Worn Next To Skin Ykk Reverse Coil Zipper Package Contents: Kryptek Arma Tech 1/2 Zip Shirt - Men's Kryptek 19ARMTZA4: Arma Tech 1/2 Zip Shirt - Men's ALTITUDE