When you receive your Sleeep® Flex, you will find a pair of extra small, small and medium Earfoams®, which fit around the barrel of the product. Start with the smallest Earfoams® and work your way up to the largest. Use the Earfoams® that is most comfortable.
It is crucial that the Earfoams® are correctly seated on the Sleeep® Flex and that they are correctly fitted in your ears, to ensure maximum sound reduction and comfort.
Here is a short video that shows how they should be inserted: