Are custom cases for extreme environments what you’re looking to find? Click on any of the S3 Cases for more information on each of our size options and suggested applications. No matter which size you choose, you’ll get the most durable, lightweight case possible. All of our cases are capable of protecting the most intricate, delicate equipment and devices in all settings. S3 Cases is one of the most flexible case lines in the world. We’ll help you design the perfect custom case that fits your needs.