It's a flexible TPE deal with on high, silicone bumpers over the edges and ABS+Polycarbonate exterior and grill. The IP65 ranking Furthermore marks it being a resilient system in most environments. While it might not be the most rugged or portable option, I find the Movement X600 best fitted https://www.bluetoothspeaker.top/outdoor-waterproof-bluetooth-speaker-wireless-shower-travel-speaker/