Original Frostproof long sleeve flannel shirt, Made in USA. 100% cotton construction with signature Frostproof brushed flannel texture. Features multicolor tartan plaid (navy, red, green, yellow, white) and classic twin flap pockets. Early 1960s–70s era with “Frostproof 100% Cotton” label, known for high-quality American workwear flannels.
Condition: Excellent vintage condition with light wear (minor age fade, no major flaws). Size: Tagged 16-L-16.5 (refer measurements)
