Sports Bra (synthetic)

Material Composition Assumptions

The typical synthetic sports bra weighs approximately 100 grams and consists of multiple engineered textile components. Polyester comprises the primary structure at roughly 70-80 grams, providing moisture-wicking properties and durability for athletic performance. Nylon contributes 15-20 grams to enhance stretch characteristics and structural integrity in high-stress areas. Elastane or spandex represents the smallest portion at 5-10 grams but delivers essential elastic recovery for compression and fit retention during movement.

Manufacturing Geography

China serves as the dominant manufacturing hub for synthetic sports bras due to established textile infrastructure and polyester production capabilities. The Chinese electrical grid operates at 555 gCO₂/kWh intensity, reflecting the country’s continued reliance on coal-fired power generation for industrial processes. This grid intensity significantly influences manufacturing emissions during fabric production, dyeing, cutting, and assembly operations. Chinese facilities benefit from vertical integration where polyester fiber production occurs near garment assembly, reducing transportation between manufacturing stages.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
China	555 gCO₂/kWh	35	Baseline
India	708 gCO₂/kWh	38	+8.6%
Vietnam	432 gCO₂/kWh	32	-8.6%
Turkey	394 gCO₂/kWh	30	-14.3%
Costa Rica	15 gCO₂/kWh	26	-25.7%

Provenance Override Guidance

1. Submit polyester fiber production methodology and energy source documentation demonstrating renewable electricity usage or recycled content percentages exceeding 50%.

2. Provide manufacturing facility energy consumption records with verified renewable energy certificates or on-site solar generation data covering production periods.

3. Document transportation distances and modes for raw materials and finished goods with shipping manifests showing actual logistics footprint rather than default assumptions.

4. Supply nylon production specifications detailing nitrous oxide capture systems or alternative synthetic fiber chemistries with lower warming potential impacts.

5. Present end-of-life program documentation for garment collection and recycling partnerships that divert products from landfill disposal pathways.

Methodology Notes

• The CCI score represents cradle-to-gate emissions including raw material extraction, fiber production, textile manufacturing, and transportation to distribution centers.
• Scope 3 dominates at 70% due to upstream synthetic fiber production requiring energy-intensive petrochemical processes and polymerization reactions.
• Scope 2 accounts for 25% reflecting manufacturing electricity consumption during dyeing, heat-setting, cutting, and sewing operations.
• Functional unit assumes one standard synthetic sports bra weighing 100 grams with medium compression rating and seamless construction.
• Use phase washing emissions are excluded as they depend on consumer behavior rather than product characteristics.
• Microplastic shedding represents environmental impact beyond carbon accounting but lacks standardized quantification methods for inclusion in primary scoring.