Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cheap plastic sole material.

I live in Florida, and wear them for relatively short periods of the year, and 99.9% indoors.I bought them in 2006, and by the end of 2007 I noticed that the cheap plastic sole material had started to split & crack.By 2008, an entire section of the sole had deteriorated away on one, and more & more cracks are appearing all around the sole lip of both.The description on Amazon indicating that the sole is made of rubber is a lie--- It's cheap plastic!The upper parts of the slipper are well constructed, but the "bottoms" are worthless!If you think $50.00 is a worthy investment for slippers that will last for only two years, than by all means buy this product.