We were worried that they would pop open as he had about 1/2" of velcro left, but they were fine and they kept his feet warm when we were outside getting to his appointment. Update (purchased August 2017, update September 2018): they still are rocking and are still very comforitable after over a year later, which is amazing. Bought as a replacement pair for when I tripped and ripped my old ones. TREBLAB HD77 nails everything that Bluetooth speaker should be. We initially had some problems with the headphone sharing jack functionality and speaker on the same side. If I could suggest one change to this, it’s to add a hole or soemthing in the handle where the safety strap can come out. I would recommend buying extra strap locks. I had a pair of on ear headphones from a no-name brand a few years ago and, while they served their purpose, they were not impressively loud and became a little aggravating on the ears after a while. And my bikes fit great and are secure. aftershokzTITANIUMを２年近く使っているので操作方法や、ボタンの位置など何も迷わないで使えました。TITANIUMも★5つにするほど超お気に入りなので、買い換えるというよりも買い足した感じです。(TITANIUMを使い続けてすっかりAfterShokzが好きになってしまいました) え〜と、まずTITANIUMと比べて～、その軽さに、装着した瞬間驚いちゃいましたね。形もあるのだろうけど10ｇってこんなに変わるんだな〜って。同じ音量で聞き比べたときの、音漏れも少なくなってました。あと大音量にしたときの、低音で肌がブルブルってするあの感じがかなり減ってます。⚠全く無いわけではありません。(え？あ、いや、でも別にあのブルブルが嫌いって言ってるんじゃないんですよ？でもちょっと、くすぐったいっていうかかゆいかな。汗)音質はTITANIUMより低音がマイルドにおさえられていて、特に中低音から高音がすごくキレイで、クリアに聞こえるようになってます。(逆に言うとTITANIUMの方が低音を感じて楽しい音かも。ただしTITANIUMは、少しこもって聞こえますし、音量を上げるとブルブルも増し増