JCPS - SPIEWAK - MEN'S SORBTEK EXS STRETCH RIPSTOP SHORT-SLEEVE DUTY SHIRTS (SU630ZS)Technical Specifications Designed to be worn with the External Vest Carrier, the upper portion of the Base Layer Polo is made of the same material as the uniform shirt to ensure color match When worn under the External Vest Carrier, the visible portions of the Performance Base Layer Polo provide all the same key features of a standard Spiewak uniform shirt Lightweight, moisture wicking, anti bacterial, breathable, athletic knit mesh on the lower