The wool comes from Spanish sheep and is certified by RWS ( Estandar de lana responsable ) but you can request another certification from any accreditation company in the field before purchasing. In stock: 450 tons They can be delivered in containers of 22.5 tons each. The wool is packed in big boxes of 350-400 kg. Minimum order : 225 tons. Merino Wool: 23 microns. 51% yield Mixed Wool: 25/26 microns. 58% yield