So, despite the marketing buzz, these things are normal earbud tips, just like the ones that came with your earbuds. I love this Crocs, but what hapen? They both have ACTIVE noise cancelation and this was the only thing that was noticeably better on the sonys, though they are best in class with this feature. He usually has problems with blistering feet but these were a welcome change. These shoes are very nice,, I just didnt like the style and returned them for a different pair. I had a look in mind these these came up. Very nice looking, well made as one would expect from Merrell. Ah unaltra cosa, sono comodissime, il gel si sente che ti da quel fresco e bla bla bla ma non fanno aderenza come si deve alla testa e quindi tendono a perdere un po di volume. It?s not expensive, perfect fit good material. returned both pairs.