Forestone Synthetic Soprano Saxophone Reed, F4 Strength, Single Reed The Forestone material is a mixture of polypropylene resin and cellulose wood fibre. More than 50 percent of the wood fiber used is bamboo. The material is brownish in colour, tasteless, odourless and non-toxic. The exceptional sound, resilience and flexibility of Forestone reeds is due mainly to this special material. Forestone reeds tend to maintain their strength / resistance over time. They vibrate well and hold the centre of the sound in a manner similar to that of a good quality cane reed. The basic timbre is robust, clear and strong, with just enough buzz to ensure projection and carrying power. Intonation is stable and the reeds articulate well throughout the range of the clarinet and saxophone. Forestone reeds will far outlast good quality cane as the proprietary composite material is impervious to water-logging and breakdown by saliva, and will not warp due to changes in humidity or altitude.