Review on YaHoGa 18 Inch 60pcs Nylon Coil Zippers: High-Quality Bulk Pack in 20 Vibrant Colors for Sewing Crafts & Tailoring by Amber Perez

Long enough for kids sleeping bags. Easy to add an extra zipper. I cut off another zipper to make a 2-way zipper, now it can be opened from the top or bottom. You must use the same brand of zip, at this price I didn't mind cutting off a piece to use on a different zip. When the zip is closed, remove the bottom zip stopper with needle nose pliers. Leave the original zipper up. Slightly separate the lower coils and first tighten slightly with the thin end. This allows the sleeping bag to be zipped up or down. After the second pull, close the new zipper at the bottom. I will try to add pictures. Nice soft zippers that work well.