When it comes to a kit that I carry on me I don´t have a "sealed kit". I rather carry belt retention system with carabiner which holds almost every item I carry on me. It´s my EDC at the same time. I add to it or subtract from it as needed. The essential items always have their place secured on the carabiner though.

This photo is not up to date, some items are missing - e.g. knife and tinder. I will have to take another photo.


I like this setup, it´s secured, I can quickly get to the items, I can see the items all the time and check their condition, ...
Items that are too big to be clipped into carabiner are carried in various pockets. This way I don´t end up with one bulky kit in one pocket.
I also have second kit which resides in the backpack. It´s for some additional or redundant items etc. It´s waterproof and "sealed".