After withdrawing some of its activity-tracking wristbands from store shelves in February, Fitbit says another version of its wearable devices will not suffer the same fate.

The Consumer Product Safety Commission has opted not to recall the Fitbit Flex, provided that the company makes some small adjustments to make it safer for consumers.

The wristband will now come with a warning that it contains nickel, a common allergen used in many types of products, and a new sizing guideline to prevent users from wearing the devices too tightly.

“We have always stood by the safety of Fitbit Flex and continue to do so,” said James Park, Fitbit’s chief executive, in a statement forwarded by a spokeswoman. “The Fitbit Flex activity and sleep tracker remains safe and effective, and one of the most popular products in the Fitbit lineup to help people achieve their health and fitness goals.”