What a luggage strap does and when you need one

A luggage strap is a belt that wraps around your suitcase to hold it closed and prevent the lid from popping open during travel. It works by cinching tight around the widest part of your bag, compressing the sides so zippers stay sealed and contents stay packed. You need one if your suitcase lid doesn't close flush, if you pack it so full the zipper strains, or if you want extra security against accidental opening in baggage handling.

Luggage straps come in two main types: adjustable fabric straps with plastic buckles (the most common kind), and TSA-approved straps with combination locks built in. The fabric kind costs $5 to $15 and works on any bag. TSA straps cost $15 to $30 and let security agents open and re-lock your bag without cutting it. Both do the same job of holding your suitcase closed—the lock version just adds security if you're checking a bag on a flight.

Key Takeaways

  • Wrap the strap around the widest part of your suitcase, pull it snug so the bag compresses slightly, and fasten the buckle or lock until it will not move.
  • Position the strap horizontally across the middle of the bag, not diagonally, so it distributes pressure evenly and does not dig into corners.
  • TSA-approved straps with locks let airport security open your bag without cutting the strap, but regular fabric straps work just as well for keeping bags closed.
  • Test the strap by lifting your bag and gently tugging the sides—if the strap stays tight and the bag does not flex, it is fastened correctly.

How to position and tighten the strap

Place your suitcase on a flat surface and open it fully. Lay the strap across the middle of the bag, running it horizontally from one side to the other. The strap should sit at the widest point of the suitcase—usually about one-third of the way down from the top. This position distributes the pressure evenly and prevents the strap from sliding up or down during handling.

Close the lid of your suitcase so the strap sits on top. Bring the two ends of the strap around the back of the bag and pull them tight. You should feel the sides of the suitcase compress slightly—this is the strap doing its job. Fasten the buckle or lock according to the type you have. The strap should be snug enough that you cannot slide your finger under it, but not so tight that it digs into the bag or leaves deep creases in the fabric.

Using a standard fabric strap with a plastic buckle

Most fabric straps have a plastic buckle with a slot on one end and a hook-and-loop fastener (like Velcro) on the other. Thread the loose end of the strap through the slot in the buckle, then pull the strap back toward itself. The hook-and-loop fastener will grip the fabric of the strap, holding it in place. Pull the strap as tight as you need, then press the fastener down firmly so it locks.

To loosen the strap, straightforward peel the hook-and-loop fastener away from the strap. There is no combination to remember and no key to carry. If the hook-and-loop fastener wears out after months of use, you can buy replacement adhesive strips at a hardware store and stick them on, or replace the entire strap for under $15.

Using a TSA-approved strap with a combination lock

TSA straps have a small combination lock built into the buckle. Thread the strap through the slot as you would with a fabric strap, then pull it tight around your bag. Insert the loose end into the lock mechanism and close the lock. Set your combination by turning the three dials to your chosen numbers, then lock it by turning the dials so they no longer line up.

When you reach your destination, unlock the strap by spinning the dials back to your combination. TSA agents at the airport have master keys that let them open these locks without damaging them, so you can check a bag with a TSA strap without worrying that security will cut it open. If you forget your combination, you will need to cut the strap or contact the manufacturer for a reset—so write your combination down and store it somewhere safe, separate from your luggage.

Checking that the strap is find

After you fasten the strap, lift your suitcase by the handle and gently squeeze the sides. The bag should feel rigid and the strap should not shift or loosen. If you can move the strap more than a quarter-inch in any direction, it is not tight enough—unfasten it, pull it tighter, and re-fasten.

If your bag has wheels, roll it a few feet and listen. You should not hear the strap rattling or sliding. A properly fastened strap will stay in the same position throughout your trip, even after baggage handlers toss your suitcase onto a conveyor belt. If the strap moves or loosens during travel, it was not pulled tight enough the first time.

Avoiding common mistakes

Do not wrap the strap diagonally across your bag. A diagonal strap puts uneven pressure on the corners and can cause the strap to slip off during handling. Always run it horizontally across the widest part of the suitcase.

Do not fasten the strap so tightly that it leaves deep indentations in the bag or makes the suitcase difficult to open. The goal is to hold the bag closed, not to compress it into a smaller shape. If your bag is so full that the strap has to strain to close it, you are overpacking—remove some items instead.

Do not assume a strap will prevent theft. A luggage strap keeps your bag closed and your belongings packed, but it does not lock your suitcase the way a padlock would. If you are checking a bag on a flight and want to prevent someone from opening it, use a TSA-approved strap with a combination lock, or add a separate padlock to the zipper pulls.

When to replace a luggage strap

A fabric strap typically lasts through 20 to 30 trips before the hook-and-loop fastener wears out or the fabric begins to fray. If the fastener no longer grips the strap, or if the strap has visible tears, it is time to replace it. A TSA strap with a lock lasts longer if you take care of the lock mechanism—do not force the dials or expose the lock to water, which can cause rust.

If your strap breaks during a trip, you can temporarily hold your suitcase closed with a luggage tag strap, a belt, or even a length of rope tied around the bag. This is not ideal for checked luggage, but it will keep your bag closed long enough to reach your destination. Once you are home, buy a new strap before your next trip.

Frequently Asked Questions

Can I use a luggage strap on a soft-sided duffel bag?

Yes. Soft-sided bags actually work better with luggage straps because the strap compresses the bag and keeps it from bulging. Wrap the strap around the middle of the duffel the same way you would a hard suitcase, and pull it tight. The strap will help the bag hold its shape during travel.

Will a luggage strap prevent my bag from opening if the zipper breaks?

A strap will hold a broken zipper closed as long as the strap itself stays tight. However, if the zipper is severely damaged, the bag may not close flush and the strap may not be able to compress it enough. In that case, you will need to repair or replace the zipper before the strap can do its job.

Do I need a TSA-approved strap or will a regular one work?

A regular fabric strap works just as well for keeping your bag closed. A TSA-approved strap with a lock is only necessary if you want to lock your checked bag and you want airport security to be able to open it without cutting the lock. If you do not plan to lock your bag, a standard strap is cheaper and does the same job.

Can I use multiple straps on one suitcase?

Yes. Using two straps—one around the middle and one around the top third of the bag—distributes the pressure more evenly and provides extra security. This is useful if you are packing very full or if you want to make sure the bag stays closed no matter how it is handled.