The Complete Handbook of Outdoor Blankets

Chapter 1: Understanding Outdoor Blankets

An outdoor blanket—as this book treats it—is a portable, engineered textile system designed to manage the conditions between a person, an object, and the outside environment. It is not a quilt you happen to carry into the garden. It is a tool with three primary functions: thermal insulation, moisture management, and surface protection. Whether you are a landscaping contractor shielding freshly poured concrete from the sun, a search-and-rescue team wrapping a hypothermic casualty, a rental house protecting a wedding party from a damp evening, or a serious camper trying to sleep at altitude, you are relying on the same physical principles to keep heat in, keep water out, and prevent damage to the surface beneath.

The distinction between an "indoor" blanket and an outdoor one is more than a label; it is a set of design compromises. Indoor blankets do not have to defeat wind, repel rain, dry quickly, resist UV degradation, or stand up to abrasive contact with sand and stone. Outdoor blankets must do all of these things, often simultaneously, and they must do so while being packable and portable. To understand what you are buying, you need to understand the physics of heat transfer, the behavior of water, and the construction methods that create a durable barrier against the elements.

Let's begin with the primary job of any blanket: keeping you or your equipment at the right temperature. The body or a sensitive piece of machinery loses heat through three mechanisms: conduction,