I chose these over SC 135 because they have more cushioning, which is important for me at my job! This is great for when Im binge watching while my wife is sleeping next to me. This Speaker Is LOUD I Absolutely Love It. Los materiales se sienten de buena calidad y la memory foam de las suelas funciona perfectamente bien. I did get blisters with the last ones at first, but they quickly became the most comfortable sandals Id ever owned! However, after leaving them in the charging case (which itself was plugged in and fully charged) for a full day, upon attempting to use them at the gym, I got a notice on my phone saying that they had only 10% battery charge left. Even with quick movements, the set stays against my face. If the product is indeed defective have them return it and give them a discount or some other type of compensation for having to waste their time on a defective product. Rien à redire. They do seem tight enough to stay on but will be cautious for a while.