You don't always wear jeans, but when you do, you should wear the Vans V56 Standard / AV Covina Jeans. With a standard fit and a wee bit of elastane to keep your movement unrestricted, there's no telling how far these bad boys will get you.
87% Cotton / 12% Polyester / 1% Elastane
V56 Standard Medium Rise / Easy Through Seat and Thigh / Tapered Leg / 16" Leg Opening
Vans 5-Pocket label pack with leather patch on back waistband
Vans clamp label on back pocket