The Bang & Olufsen Beosound Explore Bluetooth speaker boasts a scratch- and bump-resistant anodized aluminum casing with vertical rib design.The speaker's battery life of up to 27 hours makes it perfect for off-grid travel.You can clean the speaker in a stream or brush any dirt off thanks to a completely dust and waterproof design.Even when attached to your backpack, the waterproof controls are accessible and easy to use with gloves on.