The small bit of fraying on the back drawstring is the biggest sign of use

Button Detachable Quilted Liner

PTI Crossed Swords TRF Patch

Vintage Militaria / 1990's

The one leg cuff appears deformed and there are some scuffs across the trousers

Norwegian Army M51 Thermal Parka Liner - X Large Cold War The small bit of frayingAt a glance 100% Wool Lining Material Designed for the M51 Parkas but Can be Worn As Is! Button Closure Armpit Vents Great Cold Weather Kit Grey w Olive Green Edging Pit to Pit: 24" Suggested Size: X Large Slim Sleeve Length: 23" X Short Collar to Hem: 41" Vintage Militaria Dated 1968 Genuine Norwegian Army Hren Surplus Grades Grade 1 Great condition, previously issued with some use but this is pretty much just a faint mark towards the bottom hem.