Bee hive Insulation, 75% British sheep wool combined with recycled polyester fibres.
Approximately 50mm, 2 inches thick and 400mm, 16 inches square.
The natural sheepswool fibres are breathable and provide excellent insulation as well as water vapour absorption helping to keep bees warm and dry.
Pack into an empty box above the crown board under the roof for example.
For proper all round insulation for a National bee hive that really makes a difference, a WBC outer case is recommended which provides double walled insulation.