Easy Access to your FavoritesThe innovative transparent window on the InstaView Door-in-Door? enables you to check on the items stored inside without opening the door by simple two knocks. Easy to find and access to your favorites! GR-X257CSAV_Less-Cold-Air-Loss-up-to-41_120917 Less Cold Air Loss up to 41%Because LG InstaView Door-in-Door? allows you to see inside without opening the door, you can reduce cold air loss. See inside without losing your cool! *Based on Intertek testing of SX5534WB, GR-S632GLRC, and LFX3194ST/02, according to LG internal test method, measuring percentage reduction in exchange rate of air when opening Door-in-Door? compared to fridge door for 10 seconds. Results may vary by models and duration of door opening.