Heres some kit i customized for a camping trip i did before Christmas. The first thing i wanted to do is put a zip on my bivvy bag as it hard to get into,so i cut the zip and surrounding material from an NBC suit and got my good lady Wife to sew it into placewith the sewing machine. As you can see it has all the Velcro to hold the flaps down so the cold doesn't get into the bag. I tried it out and its so much easier to get into. Bivvy bag before it had the new zip. New zip in place. The next thing i wanted to make was a ground sheet with a space blanket fixed together. So i took some old cheapo camo tarp and a foil blanket and glued them together then got my wife to stitch them up with the sewing machne. Ground sheet and bivvy bag roll,quite compact and can be carried on the outside of my pack as its all water proof. The new kit worked very well,the bivvy bag was very easy to get into with no more struggling and the ground sheet worked a treat.