We use up to 1,000 8-inch individually wrapped coils (in the California King). Made in our manufacturing facility, our border coils are 16 gauge, while the interior zone coils are 14 gauge for enhanced durability. Encased in food-grade, non-woven, and non-toxic polypropylene fabric, these premium springs float independently to improve airflow, support, and spinal alignment. The coils are assembled using a safe, environmentally-conscious adhesive composed of tested components: Waxes (CAS 8002-74-2), Resin (CAS 8050-26-8), Antioxidant (CAS 6683-19-8), and EVA Polymer (CAS 24937-78-8). Made from heat-treated and stress-relieved up-cycled steel, these coils provide firm edge support and assist with back pain and pressure-point relief. Additionally, the finished innerspring unit meets OEKO-TEX® STANDARD 100, EWG Verified®, MADE SAFE®, GREENGUARD Gold, and Formaldehyde-Free Claim Verification standards, ensuring the highest safety and environmental benchmarks.