Ouch! Uncomfortable. Hard cores hurt ears when sleeping.
These are not suitable for use while sleeping. They have hard plastic cores in their centre which hurt your ears when sleeping on your side. That's painful, and so these are useless to me, as I bought them for sleeping.<br />They also seal and create a vacuum within the ear canal. this vacuum can cause sever damage to the ear drum if you pull the plug out of the ear without very carefully & slowly breaking the seal first. I worry about this happening when waking up in the morning while still groggy or  during the night if I were startled suddenly awake.<br />I threw these away and would not recommend them.
Rating: 1 stars