Microfibre and hollowfibre are synthetic fills made from polyester. Both Microfibre and Hollowfibre are fine fibres which range in weight and density.
Hollowfibre is denser than microfibre and has a full, springy feeling that creates a lovely puffy topper. It's also very affordable, making it a great-value topper filling. Microfibre is finer than hollowfibre and feels different according to the way it's used in the topper. It's typically softly supportive with a lovely squishy feeling, Some premium microfibre is so soft it can be used as a realistic substitute for down in synthetic toppers. Microfibre is more expensive than hollowfibre, but is still more affordable than good quality down.
Both microfibre and hollowfibre are machine washable, making them very easy to care for and a good choice for allergy sufferers.