Two-way zipper is more durable than one-way zipper, whether it is chain or pull.
Two-way zippers can wear two sliders, and there is generally no difference in the smoothness of two-way zippers. The shape of zipper teeth is the same on both sides, but the cost is higher.
The tape has no sun protection. Duct tape is a kind of high-viscosity adhesive tape based on thermal compounding of polyethylene and gauze fiber and coated with high-visc