R.E. LITCHFIELD / SCIENCE PHOTO LIBRARY R.E. LITCHFIELD / SCIENCE PHOTO LIBRARY
Insulation. Scanning electron micrograph of fibres of Hollofil, a dacron polyester used in sleeping bags. The core of each fibre has up to seven air cavities running the whole length of the fibre, increasing the thermal insulation properties. Magnification x4600 at 10x8 inch size.
Model release not required. Property release not required.