Guys just to add to the safety thread, I've complied a really comprehensive first aid kit for my boat and for canyon guys in particular its a great reference. I used this list as a starter and added as needed. I worked off the BLS Xtra list and supplimented it to fit my needs. Then I put all of the stuff in a Pelican EMS case. First attempts to use a medics bag yeilded soggy bandaids. Now everything is dry and easy to get to.