The plastic holder inside the faux leather is kind of pliable plastic (rather than hard, brittle plastic), maybe to make it compatible with the slight variations in overall dimensions for the various phone models it supports.

I like the rubberized inner phone case, much better than brittle hard plastic

On the plus side the part that the phone actually fits in is a softer rubber, instead of the hard plastic

Works exactly as it should and closes well even with 4-5 cards in it