These are my second pair of Teva flip flops (Sandals).  I have worn the first pair for about 13 years and they were my most comfortable flip flops ever.  They stay on your feet and the straps NEVER fall off or break!!  Also the price is very nice.  There are a few differences, the new foot bed feels soft like fabric would where the old ones had a smooth foot bed.  Not a negative as far as I can tell.  The old ones modeled themselves to fit my feet and these feel like they will do the same.  I wear a size 9 shoe and these are a size 9 and fit perfectly with a bit of room in front of my toes and behind my heel.