PrimaLoft Bio – the world’s first synthetic insulation made from 100% recycled and biodegradable fibres International Fiber Journal December 7, 2018 5 Views PrimaLoft Bio – the world's first synthetic insulation made from 100% recycled and biodegradable fibers. PrimaLoft Bio – the world’s first synthetic insulation made from 100% recycled and biodegradable fibers.