This document discusses medical device packaging. It defines a medical device and lists parameters for selecting packaging materials, including critical product characteristics and type of protection and sterilization needed. It describes common package types for medical devices, including thermoform trays, flexible formed pouches, and flexible non-formed pouches. Thermoform trays can be semi-rigid or flexible and offer advantages like ease of forming, heat resistance, and cost-effectiveness. Flexible pouches are used for single-use disposable items and offer good visibility but less physical protection. Flexible formed pouches provide some structure but are not self-supporting.