CORE worn on the chest is the most accurate location to monitor Core Body Temperature. The chest strap offers a convenient reusable way to wear CORE for activities or extended wear.
Many users find the chest strap more comfortable or convenient than the medical patches especially for extended use - though others find the opposite to be true. So it ends up being a personal preference as the accuracy is equivalent with either solution.
The chest strap is made of soft stretchable nylon that can be easily cleaned and reused. The simple clip adjustable system accommodates a wide range making for a one size to fits most.
*CORE device is not included with the chest strap.