These kits get stored together but in separate gallon ziplock bags. Some items might need used between them, like taking tape from the repair kit to wrap up a wound. The sutures aren't something I want to use but I've sewed up livestock and they lived. They are as much for gear repair as anything. I fixed a stress point on one of my tarps by sandwiching it with Tenacious tape and sewing it together through the tape. I then put another piece of tape over the stitches to waterproof it. I think it may now be the stoutest part of my tarp.