I purchased these as a surprise for my boxer-loving fiance.  These silk boxers are just the right weight.  Light enough to be very breathable, but not so light that they ride up uncomfortably.  The material is actually silk, not a cheap imitation fabric.  We have hand-washed them per care instructions twice and noted some dye run but anticipate that the next washing will be fine.  No major shrinkage was noted after the first washing, but we line dried per instructions.  As a bigger man standing 6'4" & over 275 lbs, I was worried that they would be tight.  My fears were unfounded as these boxers did not skimp on fabric in the XL size.  Both length and fullness are perfect.  I can therefore fully endorse these for larger, hard to fit guys.  My fiance has given them his stamp of approval as well!  A great, affordable alternative to plain cotton boxers for bigger guys.