These new Engel MT27 refrigerator freezer insulating bags are popular.   They not only protect your Engel freezer with a cushion layer, but they also offer added insulation for extreme conditions. 

The outer layer is made of a high quality gray canvas with an accessory pocket and ventilation holes.

The bag covers the entire unit.  Access to your freezer is easy - simply unzip the bag on top. The bags work with the corresponding Transit Slide-Loks.

In addition, the bags have a reflective layer on the inner side, offering top heat protection from direct sunlight, and long wave radiation.