Vintage Long Sleeve Blue Thermal Shirt by Silvil

Here is a super cool vintage long sleeve thermal shirt from the 70s by Silvil. Made in the USA. Dark, royal blue color throughout. It's amazingly soft, warm, and comfy, and it's in excellent condition with years of life left! Here are the measurements taken laying flat. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 17"
Shoulder to end of sleeve (including cuff) 24"
Length 20"