Synthetic fibers(British English: synthetic fibres) arefibersmade by humans withchemical synthesis, as opposed tonatural fibersthat humans get fromlivingorganisms with little or no chemical changes. Synthetic fibers are more durable than most natural fibers and will readily pick-up different dyes. In addition, many synthetic fibers offer consumer-friendly functions such as stretching, waterproofing and stain resistance. Sunlight, moisture, and oils from human skin cause all fibers to break down and wear away. Natural fibers tend to be much more sensitive than synthetic blends. This is mainly because natural products are biodegradable. Natural fibers are susceptible to larval insect infestation; synthetic fibers are not a good food source for fabric-damaging insects. Most of synthetic fibers' disadvantages are related to their lowmelting temperature:

Synthetic fibers burn more readily than natural.

Prone to heat damage.

Melt relatively easily.

Prone to damage by hot washing.

More electrostatic charge is generated by rubbing than with natural fibers.

Not skin friendly, so it is uncomfortable for long wearing

it is not a fiber it is fertilizer.

Synthetic fertilizers are man-made, inorganic fertilizers. They are normally derived from the by-products of the petroleum industry and include such ingredients as potassium sulfate, ammonium phosphate, superphosphate, and ammonium nitrate.

Most synthetic fertilizers do not contain as many of the micronutrients that plants frequently require for healthy growth. Synthetic fertilizers tend to be made up of a combination of nitrogen, phosphorus, potassium, and sulfur.