The present invention disclosed a disposable and biodegradable coverall kit made of non-woven material which consists of a head cover; a face mask; a coverall; a pair of hand gloves and; and a pair of boot covers and. The present invention further consists of a built-in protective torso covering layer at the front part of the coverall. The material of the built in protective torso covering layer is selected from the liquid proof or impermeable material to avoid biological contamination and to protect the safety and health of the laboratory workers.