The women's shirt jac fills the gap between a shirt and a light jacket — structured enough to wear open over a long sleeve or a base layer on cool mornings, polished enough to pass as a uniform shirt on its own. If you find yourself carrying a jacket to work just to take it off an hour in, this is the easier option.
 
65/35 poplin at 4.2 oz gives it more body than the standard short sleeve shirt. Double-ply yoke in the back means it holds its structure wash after wash. Convertible collar with internal stays, tagless neck.
 
Construction details:
 
• 65% polyester / 35% cotton poplin, 4.2 oz
• Top-fused convertible collar, internal stays
• Double-ply straight yoke for shape and durability
• Short sleeve — wear open as a layer or buttoned as a shirt
• Tagless collar label
• Machine wash warm, tumble dry
• Regulation USPS postal blue
Fit: Women's cut with a slightly relaxed silhouette to allow layering. If you plan to wear it buttoned as a standalone shirt, sizing down one is a good call.
 
USPS compliant. Uniform allowance eligible.