The present disclosure provides, in certain embodiments, a fiber comprising a core comprising a first polymer and at least active ingredient, wherein the at least one active ingredient is encapsulated by a second polymer； and at least one polymer layer at least partially encapsulating the core. The fiber disclosed herein may be capable of releasing the at least one active ingredient for at least three months. The active ingredient disclosed herein may be a dust mite inhibitor, and may be chosen from a fragrance, an antimicrobial, and a pesticide. Additionally, the fiber disclosed herein may be inserted into a yarn or combine with other textile materials during bulk fiber production or yarn processing, i.e., twisting and heat setting, for use in carpets, bedding, and other home textiles.
