This part is likely more for ceremonial use than active duty but given the wear it is possible it was used for both

light signs of previous use

having an elasticated waistband to fit most waist sizes

This currently issued standard piece of kit is a wonderful staple of the British Armed Forces

German Navy Sailor's Dress Trousers - W35 L31 Combat Trousers This part is likely moreAt a glance 45% Pure New Wool & 55% Polyester Blend Material Hook & Eye Closure Pleated Front 2 Waist Pockets & 1 Rear Pocket Lightweight 1" Belt Loops Zipper Fly Classic Traditional Style Solid Navy Blue Colour Waist Size: 35" Suggested Size: Medium Slim Inside Leg Length: 31" Regular Total Length: 42. 5" Vintage Retro Militaria Dated 1992 Genuine German Navy Surplus Bundesmarine Deutsche Marine Surplus Grades Grade 1. 5 Good condition, needs a bit