It appears the inner lining was repaired at one point

which fits in nicely with the other insulating features like the elasticated waistband and adjustable cuffs

something not seen too frequently these days

some with a little tarnish

Between each calf is an exterior suede padding to protect while riding

US Air Force Digital Tiger Stripe DTS Pixel Camouflage BDU Women's Combat Trousers - W33 L33 Winter It appears the inner liningAt a glance 50% Cotton 50% Nylon Blend Material 2 Slit Waist Pockets, 2 Large Leg Pockets, 2 Calf Pockets & 2 Rear Pockets Button Up Flyer 1" Belt Loops Partially Elasticated Waistband Pixelated Digital Pattern Reinforced Knee Pads Iraq & Afghan War Issue ABU Airman's Battle Uniform BDU Battle Dress Uniform Drawstring Waistband & Cuffs Grey US Air Force DTS Digital Tiger Stripe Camouflage Heavy Duty & Hard Wearing Waist Size: 33" Suggested Size: Small