How to protect your suitcase from rain | Waterproof cover guide

  • New Trip

Update date: 2025.11.26
Title

Have you ever had the trouble of your suitcase getting soaked while traveling or on a business trip on a rainy day?
In fact, many suitcases are not "completely waterproof",

The design makes it easy for water to seep in through the casters and zippers .

So in this article,

"How to keep your luggage dry even on rainy days" and "The most effective way to protect your suitcase from rain"

Explained in an easy-to-understand manner.

We've put together some practical tips you can use right away, whether you're planning a rainy day today or a trip tomorrow.

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table of contents

1. Why are suitcases vulnerable to rain?

2. The real risks that occur on rainy days

3. Why a suitcase cover is the best choice for rainy days

4. Types of suitcase covers and how to choose them

5. Practical techniques for rainy days

6. Maintenance after getting wet in the rain

summary

FAQ (Frequently Asked Questions)

First of all, aren't suitcases waterproof?

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Even if a suitcase looks sturdy, it is not actually "waterproof."
Many models tend to be vulnerable to rain for the following reasons:

1. Zippers are designed to let water in easily

Zipper type (cloth or resin)
Water can easily get into the gaps between the teeth, and prolonged rain can cause water to seep inside .

2. Water seeps in through the caster shaft and attachment points

There are inevitably gaps around the casters due to their structure.
There are also cases where the water seeps in slowly from the bottom .

3. Even if the material is waterproof, the joints are not.

The outer panels are water resistant,
- Joints such as frame joints, rivets, and screw holes are not completely sealed.

4. Fabric suitcases are particularly vulnerable to rain

Nylon and polyester are
Water seeps directly through the surface , making it unsuitable for travel in rainy weather.

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2. Real risks that occur on rainy days

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When traveling on a rainy day, even if you think you're just a little wet,

In reality, the suitcase's weaknesses become immediately apparent.

Here we will introduce some common problems.

1. Water gets into the zipper, causing the clothes inside to get soaked.

The zipper part never seals completely,
- The more rain or water droplets flow in at an angle, the more likely it is that moisture will get inside.
Water tends to accumulate especially in the corners of clothes, and the moment you open them you're likely to be surprised and say, "Oh, it's wet..."

2. Rain running down from the top can easily get into the USB port and lock area.

Carry-on size front-mounted models are

The design has many zippers and areas around the USB port, which increases the chances of rain passing through.
Even if it doesn't cause a malfunction, it is true that moisture tends to accumulate in the charging parts .

3. The casters get wet and pick up sand and mud, making them difficult to move.

The ground becomes wet and soft → mud sticks to the casters → it becomes difficult to remove.
Especially when it's raining and on a gravel road, strange noises start the next day.

4. Your jacket or bag will come into direct contact with the suitcase and get wet.

When you are in a crowd or getting on or off a train, if you tip or pull your suitcase while holding an umbrella,

The hems of your clothes, eco bags, and backpacks may come into contact with wet surfaces, causing widespread dampness .

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3. Why a suitcase cover is the best choice for rainy days

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There are various ways to protect yourself from rain.

The most effective, cost-effective, and easy method that anyone can use is a suitcase cover .
We will explain in an easy-to-understand manner the specific reasons why they are such a good match.

table of contents

1. Covers almost all directions

2. Protects delicate parts

3. Don't bring home mud or sand

4. Resistant to getting wet = odor and mold resistance

5. Low cost and high effectiveness

1. The only way to cover almost all directions

Umbrellas and raincoats are strong against rain from above,
It cannot prevent rain blowing from the side, water running down and collecting on the zipper, or water splashing up from the ground.

The suitcase cover is designed to encase the entire body , blocking out all rain.

2. Protects delicate parts such as zippers, USBs, and locks

The weakness of the suitcase is
- Zippers - Around the USB port - TSA lock - Small details such as pocket seams.

These areas are prone to deterioration when wet, and 80% of problems on rainy days are caused here.
By using a cover , moisture will not come into direct contact with the product, which will effectively prevent malfunctions, rust, and deterioration of the fabric.

3. Don't bring home mud or sand

It's easy to get on a rainy day,
・Splashes of muddy water ・Sand on the road ・Dirt on the ground


Once these dry and stick, it takes a long time to remove them.

If you use a cover, you can simply wash or wipe just the cover after it gets wet.
It won't damage the suitcase itself and requires minimal effort.

4. Less susceptible to getting wet = odor and mold prevention

When it gets wet from rain, moisture tends to build up inside.
It can cause odors, mold, and dampness in clothing.

By blocking the rain with a cover, you can prevent humidity from building up inside your suitcase, making your trip more comfortable .

5. Low cost and high effectiveness

There are rain bags and special waterproof bags available,
- Limited size options - Heavy material - Difficult to put on and take off.

On the other hand, suitcase covers are attractive because they can be used all year round , are reasonably priced, and are very effective.

Title

"Don't get wet on rainy days." A travel essential to protect your suitcase

New Trip Highly Elastic Waterproof Suitcase Cover

View product details
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4. Types of suitcase covers and how to choose them

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Even if we say suitcase cover,
Comfort varies greatly depending on the material, structure, and ease of use.
Here we will clearly summarize the points to consider when choosing a model that is strong on rainy days .

table of contents

1. Choose by material

2. Choose by shape

3. Size selection

4. Choose by function

1. Choose by material: Waterproof performance is determined here

素材タイプ 特徴 おすすめの人
PVCクリアタイプ 完全防水・透明でデザインを隠さない・着脱が簡単 スーツケースの見た目を活かしたい人 / 雨の日の移動が多い人
ナイロン・ポリエステル 軽量・撥水・折り畳める・耐久性も高め 旅行頻度が高い / 持ち運びしやすいカバーが欲しい人
厚手オックスフォード布 耐摩耗・汚れや傷からしっかり保護 砂利道やアウトドア環境の移動が多い人

2. Choose by shape: Factors that affect ease of use

形状タイプ 特徴 おすすめの人
フルカバー（上からすっぽりタイプ） 全面保護・防水性が高い・雨でも安心 雨の日の移動が多い / スーツケースを汚したくない
ハーフカバー（上部だけ保護） 急な雨に便利・装着が早い・軽量 短時間の小雨対策 / 荷物量が少ない旅行
ストレッチフィット型 伸縮素材でピッタリフィット・デザイン性◎ 衝撃・汚れを防ぎたい / 見た目も重視したい人

3. Choosing the right size: Tips to avoid common mistakes

The most common mistake when choosing a cover is that the size doesn't fit .

There are three checkpoints to avoid failure:

・ Always judge by the external dimensions (height including casters)

Check the manufacturer's size chart

・Nothing too tight (easy to tear)

The basics are

・It's easier to wear on rainy days if it's a little loose rather than snug.

・The PVC type is particularly hard, so it is important to leave some space between the pieces.

4. Choose by function: Ease of use on rainy days changes

機能 特徴 向いている人
止水ファスナー ファスナーの隙間からの浸水を大幅に軽減 書類・PCなど濡れたくない荷物が多い人
キャスターブレーキ 雨の日の坂道・電車内で勝手に動かない 通勤利用や電車移動が多い人
底面パーツの高さ（高足タイプ） 濡れた路面の水はねが本体に触れにくい 大雨・水たまりが多い地域へ行く人
フロントオープン 傘を持ったまま荷物を取り出しやすい PCや小物を頻繁に出し入れする人
防水ポケット 折りたたみ傘・濡れた衣類を分けて収納 雨の日の移動が多い／温泉旅が好きな人
Title

"Don't get wet on rainy days." A travel essential to protect your suitcase

New Trip Highly Elastic Waterproof Suitcase Cover

View product details
Title

5. Practical techniques for rainy days

Title

On rainy days, the weak points of your suitcase are easily exposed, but with a little ingenuity you can significantly prevent it from getting wet or dirty.

We've put together some practical techniques you can use starting today.

1. Wipe down the wheels before riding.

When riding a train or bus, wet casters not only dirty the floor but can also cause slipping.

Simply wiping it off with a towel will reduce any issues at your accommodation or in your car.

2. Remove the cover from the outside and attach it from the inside.

If you remove a wet cover at the entrance or in the car, the area will get wet.
The golden rule is to put it on indoors and take it off outdoors .

3. Use both hands instead of holding an umbrella (hood + folding umbrella)

When you're pulling a suitcase, it's difficult to move if one hand is occupied.
If it's light rain , you can hang a hood and a folding umbrella on your carry-on for comfort.

4. Avoid putting your suitcase through the middle of a puddle

Muddy water tends to accumulate at the edges.

Simply choose the shallow line in the middle and you will significantly reduce splash-up dirt.

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6. Maintenance after your suitcase gets wet

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If you use your suitcase on a rainy day, five minutes of care after returning home can make a big difference in its lifespan.

Even if you don't have much time, these three things are enough.

1. First, wipe the casters, then the bottom, then the body.

Because water from the wet casters splashes onto the body,
The most efficient order is casters → bottom → body .
If you wipe off water droplets quickly, no water marks will remain.

2. Be sure to remove moisture around the zipper

The zipper is a weak point that allows rainwater and muddy water to get in.
Be sure to wipe it dry thoroughly with a towel to prevent clogging.
It also helps prevent freezing on cold days.

3. Let it dry in a well-ventilated place for 1-2 hours.

There's no need to let it dry for a whole day.
Lightly drying it by the entrance or window for 1-2 hours will remove moisture from inside and prevent odors and mold.

Title

summary

Title

On rainy days, the weaknesses of a suitcase are immediately apparent.
The body, zipper, and casters are particularly vulnerable to water, and leaving them wet can cause malfunctions and deterioration.

However, by simply taking simple measures such as using a suitcase cover ,

The suitcases are surprisingly durable.

Especially, like the New Trip waterproof cover introduced this time,

Having one item to keep you dry can really reduce stress while traveling.

We hope your next trip will be safe and comfortable, even on rainy days.

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FAQ (Frequently Asked Questions)

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Q1. スーツケースは防水ですか？

A1：完全防水ではありません。
特にファスナー部分・キャスター軸・ハンドル付近から水が入りやすく、長時間の雨では内部まで濡れる可能性があります。

Q2. バスターミナル・駅までの短い距離ならカバーは不要？

A2：短距離でも雨量次第でボディやキャスターが濡れます。
特に梅雨・秋雨・雪混じりの雨は跳ね返りが強いため、カバーを使うと安心です。

Q3. カバーがない場合の最善の対策は？

A3：大判ビニール袋・レインコート・ホテルのランドリーバッグなどで代用できます。
ただし耐久性は低いので、一時的な対策として利用してください。

Q4. カバーをしたまま飛行機に預けてもいいですか？

A4：航空会社によって対応が違います。
多くの場合「外した状態」で預けるよう求められますので、事前に規約を確認してください。

Q5. 旅行後、濡れたスーツケースはどう乾かせばいいですか？

A5：タオルで水分を拭き取り、風通しのよい場所で自然乾燥させるのが最適です。
キャスターやファスナーは水が残りやすいため、重点的に乾かしてください。

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