Volcom makes the best skate jeans out there.
Real belt loops, shoelace loops, hidden stash pockets and great feeling dneim with just the right amount of stretch to A) let you skate and B) not give you mutant looking saggy knees.
Never, ever use a dryer on skate in 'real' denim. Ever.
Also, never ever use a washing machine on good/high end denim, let alone wash with soap. Hot soak them to shrink back and roll to get rid of excess water, lay flat to dry.
Oh and if you need to 'clean' them, just spot clean them with water and put them in the freezer to get rid of stank (kills bacteria).