Boys Boxer Shorts (6 & 12 Pack) Cotton Designer Trunk Boxers Underwear (5 yrs - 13 yrs)

Can you tumble dryer these?

Hi my son has autism and can not wear clothes with heams or labels or stitching nearer his skin we have trued inside out are these really smooth

How well do they fit?

how do i purchase a 12 pack of black there is no option to select 12 pack