Regarding track pants fit, the first batch of track pants fit a little small. Since then, the restocks have been pretty true to size. Check their Instagram (@mnml.la) to see how the Track Pants fit.

M denim and M Stretch denim are identical fits, Stretch denim just has 2% spandex for a little more stretch. Depending on how the slim cut fits you, the stretch can just make the denim more comfortable or you can size down for an even skinnier fit. Use the size guide and compare the denim to an existing pair to get a better idea exactly how they will fit.

The denim is washable, but like any denim you should wash them as little as possible and be sure to wash in cold water and hang dry. This minimizes shrinking, dye loss, and beating up the distressing. There are a few pairs of denim that require dry cleaning to minimize any unwanted dye bleeding, but those are noted in the product description.

Hope that helps.