Amazon has the Anker SoundCore Sport Waterproof Bluetooth Speaker for $25.49 (59.99 – 58% instant savings) with Free Shipping for a limited time.
The Anker SoundCore is IPX7 waterproof rated; making thoroughly resistant to water, dust and sand. You can get it wet, muddy, covered in snow and beaten up, and then hand wash it when you go in. It also features crisp, crystal-clear sound quality and robust bass are realized through a high-performance 3W driver and a passive subwoofer. It has anti-clipping technology to ensures distortion-free music and has an incredible 10-hour playtime with a connection range of up to 33 feet. There’s a built-in microphone for handsfree calling and durable wrist strap to easily take it on the go.