Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Warped, Discolored, Torn

I've only been using the shields for 8 months and not on a consistent every day basis. They are wrinkled, discolored, and the soft plastic is separating and disintegrating where it meets the harder plastic. This separation has caused it to develop holes that are compromising the quality and effectiveness of my pumping. While I appreciate the softness of the shields, I will be purchasing the more sturdy regular plastic ones from now on.