Pre-seasoned with flax oil for a natural non-stick finish and easy loaf release. Durable 99.1% pure iron with sturdy brass rivet Suitable for high temperatures, resists warping and buckling. Perfect for all ovens including ranges, electric, gas, and wood fired. No chemicals or PTFE are used in the coating of the pan. The edible Sussex flax oil coating is easy to wash & naturally non-stick. It is ready for immediate use. Coating can be simply restored at home, time after time. Iron loaf tins are tough and can be used at very high temperatures. Iron is a pure, simple metal which is easy to look after & very recyclable.