I have a Logitech laptop headset which is a fine piece of kit. However, the foam pads are a weird shape being a sort of oblong with curved ends. After 2 or 3 years they fell apart but when I searched for replacements all I found were lots of threads from unhappy users saying they were totally unavailable. In desperation I bought these JOOX pads as their diameter of 50mm is the same as the major axis of the Logitech pads. They go on a treat and look just like bought ones! I can't say how long they will last being in a permanently deformed shape but at this price for 3 pairsI am pleased to give them a go!