Well I ordered these as a casual sit on my butt and do nuthin type of slipper.  I needed a house shoe to be exact.  I will start off with saying that Simple has always made a well built shoe as long as I can remember them coming out in like middle school.  Now that the transition of Winter to Spring is upon us I assumed that these slides would get pretty darn hot down here in Texas.  Well you know what they say when u assume...........right?!!  Anywhos, they are quite breathable and you cant beat the solid natural rubber sole.  Solid also equates to pretty darn heavy in this case though.  For a house shoe they are a bit too heavy for my likings but you get what you pay for so I can't complain.  The natural recycled rubber and cork insole is beyond comfort.  They are great on my feet but could actually use a bit more arch support.
All in all I love the slide and wouldn't hesitate to make another purchase!