Innerspring Mattress (queen)

Material Composition Assumptions

A standard queen-size innerspring mattress weighs approximately 30 kilograms and contains the following materials:

• Steel coils: 20,000g (65% of total weight)
• Polyurethane foam padding: 6,000g (20% of total weight)
• Cotton or synthetic fabric cover: 2,400g (8% of total weight)
• Polyester fiber layers: 1,200g (4% of total weight)
• Chemical adhesives and flame retardants: 900g (3% of total weight)

The steel coil system forms the structural foundation and represents the largest environmental impact due to the energy-intensive steel production process requiring extreme temperatures for manufacturing.

Manufacturing Geography

Queen-size innerspring mattresses are primarily manufactured in China, which accounts for the largest share of global mattress production. The Chinese electrical grid operates at an average intensity of 555 kgCO2e per megawatt-hour, reflecting the country’s continued reliance on coal-fired power generation for industrial processes.

China has become the dominant manufacturing hub due to established steel production infrastructure, lower labor costs, and integrated supply chains that include both raw material processing and finished product assembly. The concentration of manufacturing in this region significantly influences the overall carbon footprint through both production energy requirements and steel sourcing proximity.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
China	555 kgCO2e/MWh	85	Baseline
Germany	366 kgCO2e/MWh	72	-15%
United States	386 kgCO2e/MWh	74	-13%
Vietnam	587 kgCO2e/MWh	89	+5%
India	708 kgCO2e/MWh	97	+14%

Provenance Override Guidance

Suppliers can provide the following data types to override the default CCI score:

1. Steel coil origin documentation showing recycled content percentage and production facility location with associated energy sources
2. Manufacturing facility energy consumption records demonstrating renewable energy usage or grid intensity variations
3. Transportation logistics data including shipping distances, methods, and fuel efficiency metrics for raw materials and finished products
4. Foam and fabric material specifications with verified carbon footprint assessments from component suppliers
5. End-of-life management programs demonstrating closed-loop recycling or material recovery initiatives beyond standard disposal

Methodology Notes

• The CCI score represents cradle-to-grave emissions including raw material extraction, manufacturing, transportation, and end-of-life disposal for one queen-size innerspring mattress
• Scope 3 emissions dominate the footprint due to steel production’s energy intensity and mineral extraction requirements upstream in the supply chain
• Functional unit is defined as one complete mattress suitable for standard queen bed frame dimensions and typical residential use
• Manufacturing energy requirements exclude facility overhead and focus on direct production processes
• Data gaps exist around regional variations in steel recycling rates and closed-loop material recovery programs
• Transportation assumes standard shipping distances from major manufacturing centers to North American distribution points