you can use any BC patch; or if you have some access to good quality nylon/Cordura you can cement a sizable piece of it using neoprene-based cement (like Bison-Kit).I have the Dan SMB and love it. I have another that needs a repair. Any suggestions on what I can seal a knife cut in a SMB?
BTW, DAN kit is the best I used so far; good visibility & very useful all-in-one signaling package