From the Manufacturer: The original Long Sleeve 5.11 Tactical Shirt sets the standard for multi-purpose tactical apparel worldwide, combining field-tested resilience and top tier tactical performance with a handsome, low profile design. - Superior tactical utility, low profile appearance - Integrated Drillex cape-back ventilation - Moisture wicking technology - 5.4 oz. 100% cotton canvas - Ready Pocket™ on chest for storing documents or a phone - Pen pockets at the left sleeve - Triple stitch construction - 26 individual bartack reinforcements - Hidden button down collar - Melamine buttons won't burn, crack, or melt - Imported New/unworn with out tags