Mio devices vary in their water resistance ratings depending on the specific model. Generally speaking, many Mio wearables are designed to be water resistant and can be used while swimming. For example, devices that feature a higher water resistance rating may be well-suited for swimming activities, while others may be better suited for activities such as running or cycling. It is essential to check the product specifications for your particular Mio device to determine its water resistance level. Look for details regarding whether the device can withstand submersion in water, as not all models are designed for swim use. Additionally, Mio's official website provides further information on each device's capabilities and specifications, which can help you in making an informed decision about using your device while swimming.