The Complete Handbook of Picnic Blankets

Chapter 1: Understanding Picnic Blankets

A picnic blanket is not a category of fabric casually thrown on the ground. It is an engineered product designed to do one job: provide a clean, dry, and durable surface between you and the ground, in an outdoor environment that is almost always harsher than expected. In practice, that means a picnic blanket is a three-layer system - a face fabric on top, a middle layer that provides the comfort and separation from cold or damp, and a backing on the bottom that protects the middle layer and the user from water, dirt, and abrasion. If you understand that basic construction, you can evaluate any blanket on the market. If you ignore it, you are buying on color and price, and the product will fail you at the worst moment - the first heavy picnic of the season.

Consider what actually happens physically when you place a blanket on grass. The ground is not flat. It is a slope covered in individual blades of grass, each one pointing upward and holding moisture from the morning dew or an earlier irrigation. Your body weight - say 80 kilograms for an average adult sitting down - presses down on the blanket through a very small contact area at the ischial tuberosities, the bones at the base of the pelvis. The pressure at that point is significant, easily several times higher than the pressure under a sofa cushion. That pressure pushes the face fabric down through the