Just a seemingly simple product made from rubber. I was skeptical at the start but it has saved me hundreds of unnecessary dollars spent on getting replacement blades for my Schick razors. This is an apt deal to couple to the Coles Schick deal this week. Get a decent razor (I recommend getting the 5 blade range) and you'll be using the same razor for many months! Trialed and tested.
This is the European advert for anyone interested
Use "SHAVE10" to get it for $19.90 Delivered