The UE Wonderboom 2 along with the UE Boom 3 are quite portable and durable. The Wonderboom is slightly far more portable than the other two, weighing in at 15 ounces and boasting IPX7 waterproofness. Its short and stout shape also will help it vanish inside of a backpack. https://www.bluetoothspeaker.top/hot-sell-speaker-outdoor-portable-rgb-bluetooth-speaker/