From Amazon
tesamoll Thermo Cover Window Insulating Film - Transparent Insulating Foil for Thermal Insulation of Windows - Includes Double Sided Tape for Easy Installation - 1.7 m x 1.5 m
Conrad Electronic
tesa THERMO COVER 05430-00000-01 Insulation sheet tesamoll® Transparent (L x W) 1.7 m x 1.5 m 1 pc(s)
OnBuy
tesa UK Thermocover Insulating Film for Windows Transparent 1.7 m x 1.5 m (Max)