Mash tun and kettle insulation

[Druid]

Looking at insulating my stainless HLT - does anyone know what the flexible closed cell insulation used on mash tuns and boil kettles (pic below) is called and where to get it?

Any experience and suggestions on the best performing product?

[Vesku]

I used camping mattress from Warehouse: http://www.forum.realbeer.co.nz/photo/img-20121006-3305?context=user

[Druid]

Thanks Guy - I discovered yesterday that its Aeroflex after searching on the AHB forum - it's distributed in NZ by Patton Refrigeration - http://www.pattonnz.com/. 13mm x 915mm x 1220mm is $71.50 per sheet.