The heavyweight is the winter pant. 15 oz polyester elastique — about twice the fabric weight of the lightweight MVS — which means real warmth on a 25-degree morning, but also a pant that drapes and holds a crease the way a uniform trouser is supposed to. If you've been wearing the lightweight year-round and freezing from October through March, this is the switch to make.
 
ComfortStretch waistband with the ComfortGrip silicone lining that keeps your shirt tucked without you doing anything — the detail that a lot of carriers don't notice until they try it for a week. Relaxed Action Fit means you can climb into an LLV and step up curbs without the crotch seam fighting you.
 
Built for cold routes:
 
• 100% 15 oz polyester elastique — genuine winter weight
• ComfortStretch waistband with ComfortGrip silicone — holds your shirt in
• Relaxed Action Fit for full range of motion
• Extra-deep quarter-top pockets, double-tipped reinforced pocket bags
• Triple-stitched crotch — outlasts standard construction by years
• Two back pockets with button tab, watch pocket
• French fly, lined and bar-tacked belt loops
• Union-made in the USA
• Regulation USPS blue with navy stripe
Sizing: True to waist. The Relaxed Action Fit runs a little fuller in the seat and thigh than slim-cut pants — if you want a cleaner silhouette, consider the Flex Waist option instead. Machine wash warm, tumble dry.
 
USPS compliant. Uniform allowance eligible.