Welcome. Sumitomo Chemical's Olyset Net was the first long-lasting insecticidal net (LLIN) to be submitted to the World Health Organization Pesticide Evaluation Scheme (WHOPES) for evaluation and was the first LLIN to receive a full WHO recommendation.

Sumitomo Chemical is active in helping the world control insect vectors which transmit diseases, cause human sickness and mortality, and contribute to poverty throughout the world.

The SumiVector website brings our Long-lasting Bednet activities and related developments to one central location.