Impact-Resistant Silicone The durable silicone case protects the device from casual scuffs & scratches while also acting as an anti-skid pad. Protection LevelThe Perseus offers minimalist design, while still protecting against surfaces that would scratch your device. Best for casual users in safe environments. A. M. S UpgradableThe Perseus silicone cover is designed to be upgradable to the tough AMS Kraken shell, providing the option to maximize the level of protection for outdoor activities & lifestyles.