Sheep wool

The primary quality metrics include Micron Count (fiber diameter), which determines softness, and Staple Length, which affects spinning strength. For high-end textiles, look for wool with a low micron count (under 18.5 for Superfine Merino). Additionally, evaluate the Yield (clean wool content) after scouring to ensure you are not paying for excessive grease, dirt, or vegetable matter.

Buyers must prioritize IWTO (International Wool Textile Organisation) certificates for weight and quality testing. For sustainability and animal welfare, ensure suppliers comply with the RWS (Responsible Wool Standard) or ZQ Certification. If the wool is intended for the EU or US markets, verify Oeko-Tex Standard 100 compliance to ensure the absence of harmful chemicals used during the scouring process.

Greasy wool is cheaper but carries higher shipping costs due to weight from lanolin and dirt; it also requires specialized cleaning facilities. Scoured wool is cleaned and ready for carding, offering a balance of cost and usability. Wool Tops are the most expensive but are combed and aligned, ready for immediate spinning, which reduces your local manufacturing overhead and waste.

The Crimp (natural waviness) of the fiber is crucial as it provides elasticity and insulation. High-quality wool should have a consistent crimp pattern. Furthermore, check for Tensile Strength (measured in Newtons per kilotex); weak fibers will break during processing, leading to pilling and poor garment longevity.

The biggest risk is weight and moisture content fraud. Wool is hygroscopic and can absorb moisture to increase weight. Always mandate a third-party inspection (such as SGS or Intertek) before final payment and use Trade Assurance on Made-in-China.com to secure your funds until the quality is verified.

Raw wool is an animal product and is subject to strict Phytosanitary and Veterinary inspections. Ensure the supplier provides a Health Certificate and a Certificate of Origin. Failure to provide these can lead to the shipment being quarantined or destroyed by customs in countries like the USA, Australia, or the EU.

For large volumes, Sea Freight (FCL - Full Container Load) is the standard. To optimize costs, use high-density hydraulic baling to compress the wool, maximizing the weight capacity of the container. Ensure the use of moisture-proof liners inside the container to prevent mildew during long transit times across different climate zones.

Negotiate based on long-term volume commitments rather than one-off purchases. Ask for tiered pricing based on the 'Clean Basis' price rather than the 'Greasy' price to ensure transparency. Requesting a 5-10% retention payment until the wool has passed a local laboratory test upon arrival is a strong strategy for ensuring quality consistency.