Tvåvägsblixtlås

Tvåvägsblixtlås, also known as a double-pull zipper, is a type of fastener that allows for opening and closing from both the top and the bottom. It consists of two sliders that can move independently or together along a single track of teeth. Each slider has a pull tab, enabling a user to manipulate the zipper from either end.

The primary advantage of a two-way zipper is its increased versatility and functionality. It allows for partial opening or closing, providing ventilation or easier access without fully unzipping the garment or item. For example, on jackets or coats, a two-way zipper can be opened from the bottom to allow for more freedom of movement or to relieve pressure when sitting down, while still keeping the upper part of the garment closed. Similarly, on sleeping bags, it can be opened from the bottom to allow a user's feet to stick out.

Two-way zippers are commonly found in outerwear, luggage, sleeping bags, and some types of upholstery. They are constructed similarly to single-slider zippers, with two rows of interlocking teeth and a separating element at the bottom. The key difference lies in the presence of two sliders, each capable of engaging with the teeth and moving in either direction. The design typically ensures that when both sliders meet, they create a secure closure. The mechanism relies on the sliders being able to slide past each other or engage with the same set of teeth.