Keyboard wrist rests are attachments placed on the front edge of the keyboard to support the user's wrist and reduce wrist strain during prolonged keyboard use. They can be made of different materials such as foam, gel, memory foam or silicone. Foam wrist rests provide a soft and comfortable feel, while gel and memory foam wrist rests provide better support and mould better to the shape of the user's wrist. Silicone wrist supports are generally durable and easy to keep clean.