Makes Magic Mouse way more comfortable Adding a concave surface along 75% of the sides of the mouse makes it much more comfortable to hold. Widens & relaxes your grip You can squeeze your mouse as hard as you please without it wedging upwards and the wider grip relieves strain. Mounts in seconds Our 3M adhesive makes it easy to put on your mouse and swap sizes. It is strong enough to stay on securely but easy to peel off. Ambidextrous and for any hand size Great for all hand sizes especially nice for medium & large hands. Also works the same no matter your dexterity. Premium silicone Premium silicone rubber construction + removable 3M adhesive. So dust off that Magic Mouse that you stuck in your drawer 2 years ago in favor of that ergonomic Logitech mouse that doesn't have Multi-touch - and make your hand happy and workflow better.