It is up to you what you fill your recovery kit with. Even if you decide you want a snatch snap, a winch extension strap, a hand winch, and more, there are multiple options available for each of these. That means you can customize your 4wd recovery kits to suit your exact preferences based on your vehicle and the gear you think you will be most likely to need in the case of an emergency. No off-roader should be without his 4wd recovery kit.
Necessary 4wd recovery kits are not complete without several oddly-shaped, though essential, pieces of equipment. Kits are more than just a compilation of gear you throw together. You can buy all-inclusive kits that come complete with a carrying bag. These are designed to be waterproof and durable so they will not rip easy. Nylon is the material of choice, as it can hold all your sodden gear to prevent a mess in your 4wd. Then, at the completion of your weekend of camping, you can simply spray out the bag and all the gear you may or may not have used that particular weekend.