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Btwin 100, Waterproof Smartphone Sleeve

Sale price: $3.00 Regular price: $4.99

A practical solution to protect your belongings such as your smartphone, bank notes, ID,... Total protection against rain. You can still use the touchscreen on your smartphone.

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Size: Select a size
Sale price: $3.00 Regular price: $4.99

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San Francisco, 735 Market St. Options

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Model: 8358615

Product Features

A photo of the Btwin 100, Waterproof Smartphone Sleeve in use

Btwin 100, Waterproof Smartphone Sleeve | Designed for cyclists wanting to safely carry their smartphone in a cycling jersey pocket.

A practical solution to protect your belongings such as your smartphone, bank notes, ID,... Total protection against rain. You can still use the touchscreen on your smartphone.


A rating of IP4 means total protection against rain.


Maximum smartphone size 6.3" x 3.1".


You can still use the touchscreen on your smartphone.

Easy to use

Soft material that's easy to fold to fit your smartphone.

Easy to open/close

Simple and fast fastening system.

Product Customer Reviews

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793 Reviews
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Btwin 100, Waterproof Smartphone Sleeve,base color
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Great item keeps phone dry

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Awesome value for money product, very happy with purchase. Bought two initially, so good bought another two as back up.

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Perfect for protecting my smartphone during bike rides in the rain. Couldn't find them anymore in Decathlon in France, I'm so happy to have found them in the UK!

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A mixed bag

This was the second sleeve I've bought. The first is excellent and still going strong but the second sleeve went an opaque white after only 2 or 3 uses, rendering it useless.

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Hello. Thanks for letting us know about the problem you encountered with this bag. Please do return the item to your closest store when it reopens or via our online team so that we can take a look at the fault and replace it with a new one.

MICHAEL, Road Cycling Leader, DECATHLON UK


Try your phone in it first in store! I chose this cycling one over the walking one or the watersports one (I have one that floats for this). This stays with me at all times now. It's cheaper than a new phone! You can also still use your smart phone through the plastic. Worth buying.

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I lost the first one and din't hesitate to buy another. Not submersible, but will keep rain and sweat out

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Hello David,

We are really sorry that you lost the first one and  we thank you very much for your feedback and hope you are satisfied  with the product. You are always welcome in our store, with great experiences.

Hope you have a nice evening and weekend,

Decathlon Milton Keynes

Work well in all weather conditions

As stated above.

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Great waterproof cover

A cheap and easy way to keep your phone dry

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Very good item!

Product is of very good quality. Came very quick too! Just what I was looking for.

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Perfect for the job!

Use this sleeve when I go cycling and put it in the back pocket of my cycling top where it's likely to get wet. I've been out in some heavy rain and it hasn't let me down.

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Water proof

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Easy to use & water proof. Very durable & transparent. Also the price is reasonable.

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It's Very Appealing to Use The product

I like the feel of using the product. My phone has finger print unlock on the side which is not accessible because of the seam. Otherwise it's a great product! Any possible option for 3.5mm jack would be awesome.

Nice product

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Keeps water away from your phone. Not very tactile friendly. If it gets damp inside it is a pain to clean. Pictures taken with it on are obviously a little hazy.

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Additional Product Information


Main fabric

  • 100% Thermoplastic polyurethane


With DECATHLON COACH, you can measure your SPEED, know about the DISTANCE you covered and view your GPS ROUTE: all stats close to hand. FREE mobile app available on AppleStore and GooglePlay.



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual