Introduction

Amazon’s Ships in Own Container (SIOC) program is a packaging standard designed to ensure that products delivered through the company’s fulfilment network can survive typical transport hazards without the need for over‑boxing. The standard was developed jointly by Amazon and the International Safe Transit Association (ISTA) and is codified in ISTA Project 6‑Amazon.com SIOC. By certifying that a product’s packaging is fit to ship on its own, vendors can reduce waste, improve customer experience and qualify for incentives. Since August 2019, Amazon has required that items larger than 18 × 14 × 8 inches be certified to either Frustration‑Free Packaging (FFP) Tier 1 or SIOC Tier 2, meaning they must be right‑sized, protective, easy to open and recyclable. Products that do not meet these standards may incur chargebacks, while early adopters can earn credit towards fulfilment fees.

Purpose of the ISTA 6‑Amazon.com SIOC Test

The ISTA 6 SIOC protocol simulates the shocks, vibrations, compression and handling a package encounters from the vendor to the consumer. It is considered a general simulation test: it challenges the combination of product and packaging against transport hazards without necessarily replicating every nuance of a specific carrier’s regulations. Packages that pass these tests are more likely to arrive undamaged, reducing returns, customer dissatisfaction and the need for additional protective materials. The procedures are divided into three parts:

• Overview – defines the scope of the program, terminology and sample requirements.
• Testing – prescribes the sequence of pre‑conditioning, shock, vibration and compression tests for each package type.
• Reporting – outlines the data that must be recorded to certify a package.
  

Testing can be performed using either English (inch‑pound) or SI (metric) units, but one system must be used consistently throughout. Before testing, stakeholders must agree on what constitutes acceptable product damage, how to evaluate product condition and what level of package degradation is allowed.

Package Categories and Definitions

Amazon uses several criteria to classify a packaged product before testing:

Shipment Method

• Parcel Delivery – the packaged item is delivered individually through a parcel network (e.g., UPS, FedEx) without a pallet.
• Less‑Than‑Truckload (LTL) Delivery – the item moves through an LTL freight network. It may be floor‑loaded or palletised.
  

Fulfilment Centre Handling Method

• Standard (Floor‑Loaded) – packages are shipped to Amazon’s fulfilment centre without their own pallet. They are stored and picked individually.
• Pallet Handling – packages arrive and leave on a dedicated pallet and are kept palletised through distribution.
  

Weight, Dimensions and Special Forms

• Weight bands: < 50 lb (23 kg); 50 – <100 lb (23 – <45 kg); ≥ 100 lb (≥ 45 kg). Parcel shipments have a 150 lb (68 kg) limit.
• Girth is length + 2 × (width + height). Items with a girth > 165 in (4.19 m) or any dimension over 108 in (2.74 m) typically ship via LTL.
• Elongated packages have a longest dimension ≥ 36 in (910 mm) and the other two dimensions each ≤ 20 % of that length.
• Flat packages have a shortest dimension ≤ 8 in (200 mm), the next longest dimension at least four times larger, and a volume ≥ 800 in³ (13 000 cm³). Items meeting both elongated and flat definitions are treated as elongated.
• Non‑rigid containers include stretch‑wraps, thin fluted corrugate or other materials with large unsupported spans that offer little protection from concentrated impacts.
• TV/Monitor refers to any package whose primary product is a television or monitor. These products often require dedicated testing because screens are fragile and handling practices differ.
  

Sample Requirements

For non‑fragile items, a single sample is generally sufficient. For fragile products—such as glass, ceramics or liquids—five samples are required. Testing should ideally be performed with production‑quality products and packaging rather than prototypes. Photographic documentation of the package design, materials and construction is recommended for traceability.

Overview of SIOC Package Types (A–H)

Amazon’s SIOC test defines eight package types (A through H), each combining shipment method, handling method, weight range and, in some cases, the product category. The test sequences vary by type but follow a common structure: environmental pre‑conditioning, optional temperature and humidity conditioning, shock (drop) tests, vibration exposure with and without top load, and, where applicable, compression and impact tests.

Type A – Small Parcel (< 50 lb) Standard Handling

• Use case: Most consumer goods weighing under 50 lb shipped individually through parcel carriers.
• Handling: Floor‑loaded at fulfilment centres.
• Tests: Packages undergo ambient pre‑conditioning, optional controlled conditioning, nine free‑fall drops with heights scaled by weight, random vibration (0.53 Grms with top load, 0.46 Grms without), additional drop tests including impacts on edges and flats, and—if the package is elongated or flat—rotational drops, bridge impacts or concentrated edge impacts. Liquid products undergo an 8‑hour leak test at the end.
  

Type B – Medium Parcel (50 – < 100 lb) Standard Handling

• Use case: Heavier consumer items such as compact appliances or large home goods that still ship through parcel networks.
• Additional tests: Besides pre‑conditioning and drops, Type B adds a tip‑over test for tall packages with narrow bases, horizontal clamp compression to simulate mechanical handling and vertical compression to account for stacking during transit. Random vibration is performed with and without top load, followed by more drops and the same rotational, bridge and concentrated edge impacts as Type A when packages are elongated or flat. Liquids still receive a leak test.
  

Type C – Heavy Parcel (≥ 100 lb) Standard Handling

• Use case: Very heavy items (up to the parcel limit of 150 lb) requiring special handling, such as exercise equipment or bulk consumer electronics.
• Tests: Conditioning is followed by a tip‑over test for tall/narrow packages, rotational flat and edge drops, an inclined or horizontal impact simulating contact with mechanical handling equipment, horizontal and vertical compression tests, random vibration with and without top load, and additional impact tests. Elongated or flat packages also undergo bridge and concentrated edge impacts.
  

Type D – LTL Floor‑Loaded (< 100 lb or girth > 165 in)

• Use case: Items shipped individually via LTL freight because of large girth or because they are fragile or awkward despite being under 100 lb. Examples include long home décor items or flat‑pack furniture.
• Tests: After conditioning, packages receive tip‑over and free‑fall drop tests. Horizontal clamping and vertical compression simulate freight handling and stacking. Vertical vibration with top load accounts for vibration on pallets and conveyors. Additional drops and, for elongated or flat items, rotational drops, bridge impacts and concentrated edge impacts are performed.
  

Type E – LTL Floor‑Loaded (≥ 100 lb or girth > 165 in)

• Use case: Bulk or heavy items that must travel via LTL, such as large exercise machines or oversized equipment.
• Tests: Similar to Type C but adapted to LTL. Following conditioning, packages undergo tip‑over tests, rotational flat and edge drops, inclined impacts, horizontal clamping, vertical compression, and vibration. Impact tests are applied at the end where applicable.
  

Type F – LTL Palletised Packaged‑Products

• Use case: Products shipped on an individual pallet directly to consumers. Common examples include appliances or heavy hardware delivered on a pallet for convenience.
• Tests: Conditioning is followed by tip‑over tests (for tall/narrow loads), rotational drops, inclined impacts, clamp and vertical compression simulations, and vertical vibration. Because the unit is palletised, the vibration test is conducted with the package strapped to its pallet and may use a top load to simulate stacking. Impact tests similar to Type E apply for elongated or flat loads.
  

Type G – Parcel TV/Monitor (< 150 lb, girth ≤ 165 in)

• Use case: TVs and computer monitors shipped through parcel networks. Screens are prone to damage, so packaging must protect against concentrated shocks.
• Tests: After conditioning, the package is subjected to nine free‑fall drops scaled by weight, horizontal clamp and vertical compression tests, random vibration with and without top load, and an inclined impact for devices weighing 100 lb or more. Elongated or flat displays also undergo rotational drops, bridge impacts and concentrated edge impacts. Unlike other fragile items, TV/monitor packages are considered non‑fragile for sample count purposes, so one sample may suffice, though multiple tests improve confidence.
  

Type H – LTL TV/Monitor (≥ 150 lb or girth > 165 in)

• Use case: Large televisions or monitors shipped by LTL freight. Their size and weight necessitate freight handling, but screens remain sensitive to vibration and impacts.
• Tests: Conditioning is followed by rotational flat and edge drops, inclined impacts, clamp and vertical compression tests, and vertical vibration with top load. Elongated or flat products require additional bridge and concentrated edge impact tests. Vibration with top load is particularly important because heavy screens experience significant stacking forces during freight transit.
  

Beyond SIOC – Integration with Amazon’s Packaging Programs

Amazon’s SIOC protocol is part of a broader packaging strategy that includes Frustration‑Free Packaging (FFP) and Ships in Product Packaging (SIPP) programs. These initiatives aim to reduce waste and simplify the unboxing experience. For example, FFP certification emphasises easy‑to‑open, 100 % recyclable packaging without excess materials. According to Amazon’s packaging guidelines, the program has eliminated over 305 million shipping boxes in a single year and reduced 24 000 tonnes of packaging materials, reflecting significant environmental benefits. Vendors that achieve FFP or SIOC certification not only avoid chargebacks but may also qualify for early‑adopter incentives.

Sustainability and Business Benefits

Complying with SIOC has advantages beyond avoiding penalties. Amazon notes that millennials and other environmentally conscious consumers value companies that prioritise sustainability. By right‑sizing packaging and eliminating unnecessary outer boxes, vendors reduce material costs and shipping weight, resulting in lower carbon emissions. Simpler packaging also speeds fulfilment and improves labour efficiency in Amazon’s fulfilment centres. Finally, a better unboxing experience enhances customer satisfaction and reduces returns, boosting seller ratings and brand reputation.

Preparing for Certification

To certify a product under the SIOC standard, vendors typically work with ISTA‑certified laboratories or testing partners approved through Amazon’s APASS (Amazon Packaging Support and Supplier) network. The process involves:

1. Design and prototyping – develop packaging that meets dimensional, material and structural requirements for the intended type. Consider using rigid corrugated material, adequate cushioning and protective end caps. Ensure the package can withstand prescribed drop heights and compression forces.
2. Sample preparation – use production‑equivalent products and packaging, including all inserts and literature. For fragile items, prepare multiple identical samples.
3. Testing – perform the sequence of tests for the applicable type under controlled conditions. Optional atmospheric conditioning may be applied to replicate extreme temperatures or humidity.
4. Evaluation – inspect the product and packaging after each test. Record any damage, measure residual package deformation and verify that functional requirements (e.g., leak integrity for liquids, screen integrity for TVs) are met.
5. Reporting – compile a test report that details the package description, test sequence, equipment used, test conditions and results. If the package passes, the report can be submitted to Amazon to obtain SIOC certification.
   

Conclusion

The ISTA Project 6–Amazon.com SIOC standard provides a robust framework for verifying that a product’s packaging can endure the rigours of Amazon’s fulfilment network without additional protective boxes. By classifying packages into types A through H based on shipment method, handling, weight and product category, the protocol ensures that test conditions mirror real‑world hazards. Vendors who invest in designing SIOC‑compliant packaging benefit from reduced waste, lower shipping costs, happier customers and eligibility for Amazon incentives. As e‑commerce continues to grow, right‑sized, protective and sustainable packaging is not just a compliance requirement but a competitive advantage.

For more information, visit https://megalabinc.com/  or reach out via email at info@megalabinc.com. Let’s work together to ensure your products are packaged for success!