Rubber boot with fibreglass instep guard

Claim 1

SAFETY FOOTWEAR COMPRISING: A SOLE ASSEMBLY; AN UPPER HAVING A TOE PORTION, A METATARSAL PORTION AND AN INSTEP PORTION AND FORMED OF AN OUTER LAYER OF A FLEXIBLE MATERIAL AND A FLEXIBLE LINING EXTENDING AT LEAST THROUGH THE TOE, METATARSAL AND INSTEP PORTIONS; A RIGID DOMESHAPED METAL BOX TOE DISPOSED IN THE TOE PORTION OF THE UPPER BETWEEN THE OUTER LAYER AND THE LINER AND EXTENDING DOWNWARDLY AT THE SIDE AND FRONT PORTIONS THEREOF INTO ENGAGEMENT WITH THE SOLE ASSEMBLY SO AS TO BE SUPPORTED THEREBY; AND A METATARSAL AND INSTEP GUARD MADE OF A STRONG RIGID MATERIAL AND HAVING A GENERALLY ARCH-SHAPED CONFIGURATION WITH A TRANSVERSELY CONCAVE INNER SURFACE AND TRANSVERSELY CONVEX OUTER SURFACE AND A LONGITUDINALLY CONVEX INNER SURFACE AND A LONGITUDINALLY CONCAVE OUTER SURFACE AND EXTENDING THROUGH THE METATARSAL PORTION AND AT LEAST THE FORWARD PART OF THE INSTEP PORTION OF THE UPPER BETWEEN THE OUTER LAYER AND LINER WITH ITS SIDE EDGES EXTENDING DOWNWARDLY AND RESTING AND SUPPORTED ON THE SOLE ASSEMBLY AND WITH ITS FORWARD EDGE OVERLAPPING THE TRAILING EDGE OF THE METAL BOX TOE SO THAT IT WILL OBTAIN ADDITIONAL SUPPORT THEREFROM, SAID GUARD AND BOX TOE BEING FREE FROM ATTACHMENT TO EACH OTHER SO THAT THE OVERLAPPING PORTIONS MAY SHIFT RELATIVE TO EACH OTHER UPON FLEXING OF THE FOOTWEAR.