Madre, a Japanese security firm, said internet orders in Japan have been trickling in for knife-resistant sweatshirts and windbreakers it makes for children. Madre's president, Minoru Furuta, said many parents are taking extra precautions after a 2001 fatal stabbing attack at an elementary school in the western city of Osaka.
The clothes are made of fiberglass and Spectra -- a lightweight material made by Honeywell of the US that is 10 times stronger than steel and has been used in bulletproof vests for US soldiers and police as well as in military vehicles and aircraft.
Japan welcomes knife-proof kids' clothes
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