Technically no electronic is absolutely waterproof, with plenty of time and depth any speaker will fail, but some Bluetooth speakers are built extra durable than others. Sturdiness will likely be indicated by an official Ingress Defense (IP) rating. From 2006 to 2018 Derek was the editor-in-chief of Canadian tech https://www.bluetoothspeaker.top/hot-selling-bluetooth-speakers-stereo-bass-outdoor-waterproof-portable-wireless-bt-speakers/