Review on Kiwi Design Face Cushion for HTC Vive: Enhanced Comfort and Eye Pad Replacement with Lens Cleaning Kit - 3 Packs (18mm/12mm/6mm) by Ray Cole

I wanted to save money by purchasing these replacement foams instead of the $30 alternative. But in this case you get what you pay for. Compared to the standard foams that come with the HTC Vive, they are much larger and cannot sit perfectly on the Velcro, causing comfort issues. As you can see in the picture, due to the size, the foam hangs over the HTC Vive's visor (after trying to position it perfectly!). Another figure shows how big it is compared to stock. In addition, the foam has nowhere to anchor, which makes leveling the original much easier. I do not recommend them at all!