Everything you need to know about bag and backpack zippers

The zipper, also called a zip or slider, is an often underestimated element when choosing a backpack or handbag . Yet, it plays a central role: security , durability , water resistance , aesthetics … A poor-quality zipper can ruin an otherwise perfect bag. In this article, we explain everything you need to know about zippers to make an informed and lasting choice.

Who invented the zipper?

The zipper was invented in the United States at the end of the 19th century, but it was in the 1920s that it became a common element in the textile industry. The term "zipper" is actually an onomatopoeia that imitates the sound of the zipper.

Today, they are everywhere: clothing, luggage, shoes, and of course handbags and backpacks . Several types of closures exist, but they are not all created equal.

How does a zipper work?

A zipper is composed of:

• of two textile strips onto which teeth (made of plastic, metal or nylon) are fixed

• a slider , which slides the two strips to open or close them

• stops (top and bottom) that prevent the cursor from exiting

The quality depends on the material used , the precision of the assembly , and the strength of the seams .

The different types of bag closures

Classic plastic zippers:

They are often found on entry-level bags. They are lightweight and inexpensive, but can break or derail easily with heavy use. Their durability depends largely on the density of the teeth.

Metal fasteners:

More durable, they are used on leather handbags , city bags, and some travel bags. The metal gives a high-quality and solid look, but can oxidize if exposed to moisture.

Injected nylon closures:

Flexible yet strong, they are ideal for soft bags or backpacks. They withstand tension well and are less prone to jamming.

Waterproof zippers:

Designed to prevent water from entering the bag, they are used for waterproof backpacks , outdoor bags , and bags for cycling and hiking. They are often covered with a rubberized coating or a protective flap.

Warning : not all closures advertised as "waterproof" are the same. Some are only "water-resistant" (resistant to light rain) while others are truly waterproof.

YKK zippers: the global standard

YKK is a Japanese company founded in 1934. Today, it is considered the world leader in quality zippers . The brand manufactures its own machines and components, and carries out rigorous quality controls at every stage.

Why is YKK considered a benchmark?

• Ultra-precise manufacturing: each tooth is molded and aligned to guarantee smooth gliding

• Wear resistance: Laboratory tests show that YKK keys can withstand thousands of opening/closing cycles.

• Waterproof and durable: the YKK Aquaguard range is renowned for its waterproofing on outdoor and sports bags.

They can be found in high-end bags, quality luggage, hiking backpacks, and well-designed city bags. At Bag-Haven, you'll find bags and backpacks featuring this YKK zipper technology.

Comparison of zipper qualities

Closure type	Resistance	Waterproofing	Flexibility	Ideal for...
Basic plastic	Weak	No	Average	Small bags, for occasional use
Metal	Good	Weak	Average	Handbags, urban bags
Injected nylon	Very good	Weak	Excellent	Backpacks, sports, hiking
Waterproof	Very good	Very good	Good	Outdoor bags, cycling, rain
YKK (all ranges)	Excellent	Variable	Excellent	All types of bags, high-end

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Some tips for choosing (and maintaining) your closure

• Check the cursor's smoothness : it should not catch or jam.

• Examine the seams around the zipper: they should be even and strong.

• For bags intended for daily or intensive use, always opt for YKK or injected nylon.

• For outdoor activities, opt for bags and backpacks with waterproof zippers , even if they are more expensive.

• Don't forget to maintain the slide : remove dust, lightly lubricate with a stick or special wax

In conclusion

Never underestimate the importance of the zipper when choosing a bag. Whether it's an elegant handbag , a hiking backpack , or an urban sports bag , the quality of the zipper guarantees durability, security, and ease of use .

The next time you're choosing a bag, take a look at the zipper: if it's a YKK , you're already on the right track. Also, check out this guide which presents different types of zippers.