External awning blinds protect against the heat of the sun. They absorb solar radiation even before it reaches the window and emit it outside, thus preventing an increase of temperature in the room. More information here.
Solar awning blind is an appropriate combination of effective protection from heat and comfort of use. Due to the fact that the awning blind absorbs solar radiation before it reaches the glazing and emits the heat to the outside of the room, it constitutes much better protection from tiresome heat in the sunny days than internal accessories. More information here.