eBay with Beach Camera has the Samsung 32GB Class 10 Waterproof, Shockproof and Magnet-proof microSDHC Card (MB-MSBGA/US) for $30 with free shipping. Survives in sea water for up to 24 hours, can be run over by a 1.6 ton vehicle, and can withstand a 10K magnetic force.
For years I've made a habit of dunking my cellphone in sea water, and the darn flash memory often failed. But now I won't have that problem any more.
but can it withstand sea water, being ran over by a 1.6 ton vehicle, and 10K magnetic force ALL SIMULTANEOUSLY?
I always wondered what a 10k magnetic force might be like. If it's like what I think it is, I might be able to join the Avengers