Glossary
Void fill
Definition
Material used to fill empty space in a box so contents cannot move in transit. Common types include paper, air pillows, bubble wrap and loose fill.
Also known as: Packing filler, Box filler, Dunnage
Void fill is anything you pack around a product to take up empty space and stop it shifting during delivery. Movement is a leading cause of transit damage, so filling voids keeps contents centred, away from box walls, and cushioned against knocks and drops.
The main options are paper (crumpled kraft or fan-folded), inflatable air pillows, bubble wrap, foam and loose fill such as starch or polystyrene chips. Paper and air pillows dominate modern e-commerce because they are light and, in the case of paper, kerbside recyclable. The right choice depends on product fragility, weight and how much your customers care about plastic-free unboxing.
Void fill is about filling space, whereas protective wrapping like bubble is about surrounding the item itself; many packs use both. Aim to fill gaps snugly without over-stuffing, which wastes material and can burst seams.
What to check
- Match the fill type to product fragility and weight.
- Prefer recyclable paper if plastic-free unboxing matters to customers.
- Fill voids snugly without over-stuffing and stressing the box.
- Consider dispenser speed and bench space for high-volume packing.
- Weigh material cost against damage and return rates.
Need help choosing the right spec?
Tell us what you're packing and your quantities — we'll recommend the right size, grade or material and price it for your order.
Void fill — FAQs
What is the difference between void fill and protective wrap?
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