SKAGGS Postal Uniforms | Quality USPS Postal Uniforms at Discount Prices SKAGGS Postal Uniforms provides union preferred USPS regulation Postal Uniforms and accessories for Window Clerk, Letter Carrier, City Carrier Assistants and Mail Handler USPS employees. Postal shirts, postal shoes, outerwear and postal accessories. Free USPS shipping. 10% discount with full uniform allowance postal uniform orders.