There were two, key reasons I decided to purchase these sandals/flip-flops: 1) the quality and reputation of the 'Reef' brand; and 2) they had them in size 14 (I normally wear 13's, but most sandals in that size leave my heel almost hanging over the back edge).  When I first tried the sandals on, they seemed a little stiff, but have since acquired that nice, comfortable "worn-in" feeling.  The one feature that I found *fascinating* about these sandals is the fact that a bottle opener is embedded into the bottom of the shoe ... which does not interfere with walking or general comfort of the sandal. And even though it was not a requirement, per se ... I decided to try it out.  Sure enough, to my complete surprise I was able to open a bottle of Dos Equis beer with no trouble at all.  Way cool!