Bought a new pair. Good fit and inexpensive. Sadly got caught in traffic in car, long jam, 2 hours without moving. Breaking my neck for a piss. Had to urinate at side of road, so much urgency built up, left it late, buttons on fly too tight, wresting like a good 'un, onlookers thinking I am jerking off, slashed all in the jeans and down my leg. Next time I'll buy ones with a zip.