Organic cotton is grown without chemical pesticides and fertilizers, considering the environment and the people who work with the cotton. In addition, it contains no genetically modified organisms (GMOs).
Much of the organic cotton is grown in areas where rainwater is an asset, which reduces the pressure on local water sources. The absennce of chemicals also means that the water is cleaner and safer for the environment and growers. On the same cultivated land crops are alternately grown which is good for the soil and serves as a complement to the grower's food and income.
We often label our cotton products for washing in 40 degrees, you could preferably lower the temperature and wash only when really needed. Cotton can shrink 3-5% after laundry. Cotton can be ironed at high temperature.