Nolan N53 Sécurité Et Instructions D'utilisation page 13

8. Filter Frame Disassembly
To remove the filter holding frame from the inner chin guard, pull the frame towards
the inside of the helmet first near its side ends and then near its upper and lower cen-
tral ends, removing the corresponding fastening flaps from the slots on the inner chin
guard (Fig. 13).
9. Filter Frame Assembly
To reassemble the filter holding frame on the inner chin guard, insert one by one the
upper and lower central frame fastening flaps in the corresponding slots on the inner
chin guard and then insert the side flaps (Fig. 13).
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