Void Fill Materials for E-commerce: Paper vs Air Pillows vs Foam vs Biodegradable Options

The best void fill material for e-commerce depends on your product weight, fragility, shipping distance, and sustainability goals. Paper-based fills work for most lightweight goods, air pillows offer the best cost-per-cubic-foot for medium-weight items, foam remains the standard for fragile electronics and glassware, and biodegradable options like cornstarch peanuts now match traditional foam on protection while decomposing in under 180 days.

If you've ever opened a package stuffed with a ridiculous amount of plastic air pillows — only to find a single lipstick rolling around inside — you already know the problem. Most e-commerce brands pick void fill based on what their supplier had in stock last month. Not based on what actually protects the product, cuts costs, and doesn't make the customer feel guilty about their carbon footprint.

I've spent way too much time testing these materials side by side. Here's what actually matters.

Why Void Fill Choice Is More Than a Shipping Detail

Empty space inside a box is where damage happens. The Freedonia Group published a study in 2024 showing that void fill failures account for roughly 11% of all e-commerce product damage claims. For a business shipping 10,000 orders a month, that's 1,100 potentially damaged packages per year — and each one costs an average of $17.20 to replace (including return shipping), according to Shippo's 2024 fulfillment benchmark.

That adds up to nearly $19,000 in annual losses from bad void fill alone.

But here's the thing — switching to the right material doesn't always mean spending more. Some brands actually cut their per-package cost by moving away from the material they assumed was cheapest.

A solid void fill strategy also connects to how your outer packaging performs. The best void fill in the world can't save a product if the box itself is wrong.

Paper-Based Void Fill

Crumpled Kraft Paper

The workhorse. Crumpled kraft paper costs between $0.02 and $0.06 per cubic foot when bought in rolls, making it one of the most affordable options at scale. It's also what most subscription box companies default to because it photographs well in unboxing videos.

Ranpak's 2025 packaging report found that kraft paper cushioning absorbs roughly 85% of drop impact from heights up to 30 inches. Solid for items under 5 pounds. Heavy ceramics or electronics? Not enough.

One downside nobody talks about: speed. Manual crumpling is slow. Ranpak and Pregis sell automated paper-cushioning machines starting around $3,500, which crank out pre-crumpled pads at 30–40 feet per minute. Worth it once you're shipping 200+ orders per day.

Honeycomb Paper Wrap

A newer player. Honeycomb paper wrap expands into a lattice pattern that conforms around products — think bubble wrap, but paper. Pricing sits between $0.04 and $0.10 per wrap depending on roll size.

The environmental angle is strong. It's curbside recyclable, home compostable, and eliminates the customer guilt that comes with plastic. A 2025 survey from Dotcom Distribution showed 62% of online shoppers said paper-based packaging made them more likely to reorder from a brand. You can't ignore that number.

Air Pillows and Air Cushions

Air pillows have dominated e-commerce void fill since the mid-2010s. Amazon uses them. So does just about every major 3PL.

Cost per cubic foot runs between $0.01 and $0.03 — the cheapest option on this list by raw material cost. The machines that inflate them (from companies like Sealed Air and Pregis) cost $1,500 to $5,000 and produce pillows on demand. No storage overhead for pre-made fill.

STM PackTEST ran drop tests in 2024 comparing air pillows to crumpled paper for items between 2 and 10 pounds. Air pillows reduced breakage rates by 23% compared to loose paper fill. The cushioning is more consistent because each pillow has uniform inflation.

The problems? Two big ones.

First, popping. Roughly 5–8% of air pillows arrive at the destination deflated, according to a 2024 Chainalytics fulfillment audit. Temperature changes during transit cause air expansion and contraction. High-altitude shipments are particularly vulnerable — a pillow inflated at sea level in a New Jersey warehouse can burst crossing the Rockies.

Second, sustainability perception. Even though many air pillows are now made from recycled LDPE and are technically recyclable at store drop-off locations, customers still see them as "plastic waste." That perception gap is real — and it's why brands selling to eco-conscious demographics are moving away from air pillows despite the cost advantage.

For more on how packaging choices affect return rates, check out our deep dive on reducing e-commerce returns through better packaging.

Foam Options

Traditional Expanded Polystyrene (EPS) Peanuts

Foam peanuts have been around since 1965. Still effective. Still hated by customers.

Protection-wise, EPS peanuts excel. They distribute impact across the full cavity, conforming loosely around irregular shapes. The Protective Packaging Corporation's 2023 data showed EPS peanuts reduced product damage by 31% compared to air pillows for items over 10 pounds.

Cost: $0.08 to $0.15 per cubic foot. Not cheap. And they're static-prone, messy, and an environmental headache — EPS takes an estimated 500 years to decompose in landfills, according to the EPA.

Honestly? Unless you're shipping heavy ceramics or lab equipment, there are better options in 2026.

Polyurethane Foam Inserts

Custom-cut foam inserts are the gold standard for high-value items. Think electronics, medical devices, luxury goods. They're precision-cut to cradle specific product shapes, which eliminates movement entirely.

Cost jumps significantly: $0.50 to $3.00 per insert depending on complexity and volume. But when you're shipping a $2,000 device, a $2 foam insert is insurance you don't think twice about.

The manufacturing process has gotten faster too. CNC foam cutters from companies like Grafotronic can produce custom inserts from a CAD file in under 4 minutes. That used to take days with manual die cutting.

Biodegradable and Compostable Options

This is where the market is moving fastest.

Cornstarch Packing Peanuts

Cornstarch peanuts dissolve in water within minutes and decompose fully in a commercial compost facility within 90 days. A 2025 study from the Sustainable Packaging Coalition found they provide impact absorption within 7% of traditional EPS peanuts — essentially equivalent for most e-commerce applications.

Pricing: $0.10 to $0.18 per cubic foot. More expensive than EPS, but the gap has narrowed from 3x in 2020 to roughly 1.3x today. Scale is driving that compression.

They do have a quirk: moisture sensitivity. In humid warehouse environments (above 70% RH), cornstarch peanuts can become tacky and clump. Not a dealbreaker, but you need climate-controlled storage.

Mushroom Mycelium Packaging

Still emerging for void fill specifically, but companies like Ecovative Design are producing mycelium-based cushioning that grows to fit custom molds in 5–7 days. Cost remains high ($1.00–$2.50 per unit) and production timelines make it impractical for high-volume e-commerce. For now.

If you're curious about the broader landscape of decomposable packaging, we covered the full spectrum in our breakdown of biodegradable vs compostable vs recyclable materials.

Side-by-Side Comparison

Here's the quick-reference table every fulfillment manager actually needs:

| Material | Cost/cu ft | Drop Protection (30 in.) | Sustainability | Best For | |----------|-----------|--------------------------|----------------|----------| | Crumpled kraft paper | $0.02–$0.06 | Good (under 5 lb) | Recyclable, compostable | Light items, subscription boxes | | Honeycomb paper | $0.04–$0.10 | Good (under 8 lb) | Recyclable, compostable | Wrap-style protection, DTC brands | | Air pillows | $0.01–$0.03 | Very good (2–10 lb) | Recyclable (LDPE drop-off) | High-volume fulfillment centers | | EPS foam peanuts | $0.08–$0.15 | Excellent (10+ lb) | Not recyclable, landfill | Heavy, fragile items | | Cornstarch peanuts | $0.10–$0.18 | Very good (under 10 lb) | Compostable (90 days) | Eco-conscious brands | | Custom foam inserts | $0.50–$3.00 | Superior | Not recyclable | High-value electronics, medical |

How to Choose: A Decision Framework

Start with three questions.

What does the product weigh? Under 5 pounds, paper works. Between 5 and 15 pounds, air pillows or cornstarch peanuts. Over 15 pounds, you're looking at foam or custom inserts.

What's your damage tolerance? If returns and replacements are eating your margins, spend more on protection. A $0.12/unit switch from paper to cornstarch peanuts costs $1,200 per 10,000 shipments — but preventing even 70 damage claims at $17 each saves $1,190. Nearly break-even on damage alone, plus the sustainability marketing lift.

Who's your customer? Selling to Gen Z and millennials? Dotcom Distribution's 2025 data is clear — 62% of those shoppers prefer paper or plant-based fill. Selling B2B industrial components? Nobody cares if you use foam peanuts. Ugly truth, but true.

The Trend: Paper Is Winning

Smiths' 2025 protective packaging forecast projects paper-based void fill will capture 41% of the e-commerce market by 2028, up from 28% in 2023. Air pillows are projected to drop from 35% to 27% over the same period.

The driving force isn't just consumer preference. Extended Producer Responsibility (EPR) regulations in the EU, Canada, and several U.S. states are imposing fees on non-recyclable packaging materials. By 2027, plastic-based void fill in the EU will carry an estimated surcharge of €0.80 per kilogram under the updated Packaging and Packaging Waste Regulation (PPWR).

Brands that switch early avoid the surcharge and the scramble.

Editor's note: We're tracking EPR regulation impacts on packaging costs in real time. Expect a dedicated breakdown later this quarter.

Frequently Asked Questions

What is the most cost-effective void fill for small e-commerce businesses?

Air pillows cost $0.01 to $0.03 per cubic foot, making them the cheapest option by raw material cost. However, crumpled kraft paper at $0.02 to $0.06 per cubic foot requires no machine investment — just rolls and hands. For businesses shipping under 100 orders per day, kraft paper typically wins on total cost when you factor in equipment.

Are biodegradable packing peanuts as protective as traditional foam peanuts?

Nearly. The Sustainable Packaging Coalition's 2025 testing showed cornstarch peanuts absorb impact within 7% of traditional EPS foam peanuts for standard e-commerce drop heights. The main limitation is moisture sensitivity — cornstarch peanuts can degrade in humid conditions above 70% relative humidity.

Can air pillows be recycled?

Most air pillows made from LDPE (Low-Density Polyethylene) are recyclable through store drop-off programs, not curbside recycling. The recycling rate remains low — the EPA estimates only about 5% of LDPE film gets recycled in the U.S. This is why many brands are switching to paper alternatives despite the cost difference.

How much void fill do I need per package?

The general rule is to leave no more than 2 inches of empty space between the product and box wall on any side. For a product centered in a box, your void fill should occupy roughly 40–60% of total box volume. Overfilling wastes material. Underfilling allows movement and increases damage risk.

Is honeycomb paper wrap better than bubble wrap?

For items under 8 pounds, honeycomb paper provides comparable cushioning to standard bubble wrap and offers significant advantages in recyclability and customer perception. For heavier or highly fragile items, bubble wrap's air-retention properties still provide better sustained cushioning. The crossover point is typically around the 8–10 pound range.