Onesies should be treated differently from your normal clothes. If you’re washing Onesies for the first time, it is recommended to use cold water and laundry detergent. Make sure you set up your washing machine for the gentle wash. Never ever use chlorine bleaching on onesies or you will regret it later. If it is absolutely necessary for you to use bleach, then use non-chlorine bleaching powder or liquid. To keep fleece fluffy protected, it is highly recommended that you wash your onesie very gently. It is normal to see some pilling on your onesies. This is natural. A good fabric shaver can be used alternatively
Never ever do ironing in your wildest dream. Onesies are not made for ironing. Ironing won’t be pretty and there is no return/refund in such case.
Onesies take more time in drying compared to your normal clothes. Usually, onesies can take an entire day to dry. It is recommended that you dry your clothes in a natural sunlight. In case, if it is absolutely necessary for you to dry quickly, you can use air dryer on lowest possible heat/temperature. Basically, onesies are preferred to dry naturally at room temperature than hot air. Excessive static may happen in the winter season so be prepared for that.