One of the newest wearables to hit the market is GTX’s SmartSole, a GPS tracking device placed in the bottom of a shoe. The sole is targeted at young children, elderly, and even people traveling to unsafe places.

The SmartSole is a foam insert embedded with a quadband cellular modem and SIM card that works worldwide. It also has a GPS radio, rechargeable battery, and is waterproof. Currently, the battery life is around five days.

Users can see the information provided by the GPS tracking system by logging in online or using the SmartSoles app and set geofences. When someone wearing the soles wanders out of the safe zone, a push notification will be sent.

With everyday wear, the soles will last 12 to 18 months. A pair of the soles retails for $299 with a monthly service fee ranging from $10 to $30.