Sound very good, but ....

At first I was really excited about this Earplugs. They have everything you could want for a product in this price range: good sound, several different insets for the ears and an appealing packaging.
However, one of the listeners has disintegrated into its component parts (logically after the Amazon return period) (a picture I've attached). This has happened without any particular stress, while a leisurely transition to S-Bahn.
Maybe I was just unlucky with my copy, but I guess because of this experience it from this product to purchase. 3 months for 30 happens to be not a good price / performance ratio.