Large Orthopedic Memory Foam Lumbar Support Backrest

Built with a broad contour, this large memory foam backrest provides maximum spinal surface contact to alleviate chronic posture fatigue. Using premium 50D non-temperature-sensitive memory foam, it retains ideal firmness in both winter cold and summer heat. It effectively corrects slouching, making it an essential ergonomic upgrade for office task chairs, long-haul vehicle seats, and gaming chairs.

Parameter
Features

Material Raw Options	Domestic slow-rebound memory foam / BASF MDI virgin memory foam / Imported BASF non-temperature-sensitive memory foam.
Density Selection	35D (35 kg/m³) soft / 40D medium-soft for everyday casual use / 50D high-density firm support for long office sitting without collapsing.
Rebound Speed Options	4s to 6s slow rebound / 3s to 4s standard rebound / 3s precision slow rebound (Non-temperature-sensitive, consistent firmness across winter and summer).
Load Capacity Limit	≤80 kg / ≤100 kg / ≤120 kg (Optimized for heavy-weight users).
Environmental & Safety Certifications	Standard quality inspection / CertiPUR-US international eco-friendly certification / Dual certification: CertiPUR-US + OEKO-TEX textile safety standard (No harmful off-gassing).
Service Life Standard	Normal use 1 to 2 years with minimal collapse; 3 years with rebound loss < 10%; 5 years of stable deformation-resistant support.

Key Features & Selling Points:
- Broad Support Surface: Large anatomical back profile covers the mid and lower back for full-scale weight distribution.
- Constant Year-Round Hardness: Non-temperature-sensitive 50D foam maintains ideal bounce without stiffening in cold weather.
- Durable Elasticity: Tested to retain over 90% of original bounce and height after 3 years of daily use.
- Manufacturer Advantage: Full OEM customization including custom foam formulas, outer fabric covers, and compressed roll packaging.