About Riker Mounts: Cotton filled chipboard frames with a glass top and hanger on back. The butterflies are not glued, they are gently pressed against the glass by the cotton. Riker mounts are not sealed and can be easily opened to extract or reposition the butterflies by removing 2-4 pins. The butterflies will last for many, many years as long as you keep them out of direct sunlight.
Important: Click here for info about bargain riker mounts, which feature butterflies with issues like scratches or stains.