Activity Bracelet... please!!!!!

[Firstbimmer]

Can we please have a waterproof activity bracelet option that acts as a car key? I would give anything to be able to leave my phone and keys at home when I drive to swim/kayak/backpack/float. I don't want to have my phone be the key or carry my keyfob in a waterproof bag and find swimsuits that have zippered pockets. It would be so amazing to go play on the river and lakes all day and never have to worry about getting my keyfob wet or leaving it on the shore while I'm in the water. Please, please, please....