Silicone-rubber keypads are incredibly soft and comfortable to use when compared to other materials. While other materials are hard and difficult to use, silicone rubber is soft and rubbery.

It’s also worth mentioning that silicone=rubber keypads are resistant to extreme temperatures. Whether they are used in hot or cold environments, silicone-rubber keypads can withstand extreme temperatures without sustaining damage. This makes them a popular choice in factories or assembly lines where heat is common.
As previously discussed, silicone-rubber keypads also produce tactile feedback. This is important because studies have shown that tactile feedback improves typing accuracy. It signals to the user that his or her command was registered, eliminating double entries and other erroneous commands.

Silicone rubber is just one type of material from which keypads are made. Plastic is another popular choice. However, only silicone rubber offers the soft texture of this material. Perhaps this is why so many mechanical engineers now prefer silicone rubber over other materials for their keypads.