These Thermal Blinds are made specifically for the T5 and T5.1

The blinds consist of silver reflective foil on one side , a thermal filling in between and a grey fabric the other side, finished with a black edge binding trim.

The Silver side faces outwards and reflects the sun. if you want to stay cool . If you want the blinds to act as Thermal you reverse the blinds.
 
The benefits of thermal blinds are:
 
Keeps the interior cooler on warm sunny days
Prevents condensation during cool winter days
Keeps the interior warmer on cool winter days
Prevents sun bleaching of the vehicle interior fabric
 
Features world leading suction cup design (ADAMS)