YOSH TW403-WNS-US
User Manual for YOSH Floatable Waterproof Phone Pouch
Model: TW403-WNS-US
1. Product Overview and Key Features
The YOSH Floatable Waterproof Phone Pouch is designed to protect your smartphone from water, dust, and sand, making it ideal for various water activities. Its unique floating ability ensures your device remains on the surface of the water, preventing loss.

Image: Two YOSH waterproof phone pouches, showcasing their design and waterproof capabilities in water.
Key Features:
- IPX8 Waterproof: Each case is rigorously tested underwater at 30 meters depth for half an hour, featuring a new snap-and-lock seal clip and fully enclosed edge for superior protection against water invasion.
- Extraordinary Floating Ability: Equipped with an enhanced Double-Layer Airbag, this pouch offers superior buoyancy, capable of floating smartphones weighing less than 350g. The airbags around the case and on the back contribute to better phone flotation.
- Large Space Design: Accommodates phones up to 9 inches, eliminating the need to remove your phone case. Compatible with a wide range of smartphones including iPhone 15/14/13/12/11 Pro Max, Samsung S23/S22, Huawei, Xiaomi, Google Pixel, OnePlus, OPPO, LG, and more.
- HD Transparent and Highly Sensitive Touch: The TPU material ensures a highly responsive screen-touch experience, allowing you to take pictures, videos, and send messages with ease.
- Improved Wide Lanyard: A 12mm wide, adjustable, and tangle-proof lanyard provides comfortable and secure usage, ensuring the pouch remains safe even during intense water sports.
2. Initial Setup and Waterproof Test
Before first use, and before each subsequent use, it is crucial to perform a waterproof test to ensure the integrity of the pouch and protect your device.
Performing a Waterproof Test:
- Open the snap-and-lock seal clips by pushing the levers outwards and lifting the top bar.
- Insert a piece of tissue paper into the pouch.
- Carefully close the pouch, ensuring the seal clips are fully engaged and the top bar is securely locked. Listen for a click sound.
- Submerge the sealed pouch in water for at least 30 minutes. You may gently press on the pouch to check for air bubbles escaping, which would indicate a leak.
- Remove the pouch from the water, dry the exterior thoroughly, and then open it.
- Check the tissue paper inside. If it is completely dry, the pouch is ready for use. If the tissue paper is wet, do not use the pouch and contact customer support.

Image: The YOSH pouch features an easy-to-use and soft sealing mechanism, contrasting with older designs that may be harder on fingers or less sensitive to touch.
3. Operating Instructions
Inserting Your Device:
- Ensure the pouch is dry and clean before inserting your phone.
- Open the snap-and-lock seal clips.
- Gently slide your smartphone into the pouch. The large design accommodates phones up to 9 inches, even with most cases on.
- Ensure the phone is centered and there are no foreign objects near the sealing area.
- Press down firmly on the top bar and engage both snap-and-lock clips until they click securely into place. Double-check the seal to ensure it is completely closed.
Touchscreen and Button Usage:
The transparent TPU material allows for highly sensitive touchscreen operation. However, please note that touchscreen functionality may be limited or unresponsive underwater due to water pressure. In such cases, use the volume buttons on your phone to take photos or videos.
Lanyard Adjustment and Card Holder:
The adjustable lanyard can be customized for comfortable carrying around your neck or wrist. Simply slide the buckle to shorten or lengthen the strap. The pouch also features a separate card holder space, allowing you to carry essential cards like IDs or credit cards securely.

Image: Detailed view of the pouch's dimensions (85mm width, 170mm height), adjustable lanyard, integrated card holder, and larger viewing window, designed for large-sized mobile phones up to 9 inches.
4. Care and Maintenance
Proper care will extend the life of your YOSH waterproof phone pouch.
- Cleaning: After each use, especially in saltwater, rinse the pouch with fresh water and wipe it clean with a soft cloth. Do not use abrasive cleaners or solvents.
- Drying: Ensure the pouch is completely dry before storing.
- Storage: Store the pouch in a cool, dry place away from direct sunlight and sharp objects. Avoid folding or creasing the sealing area.
- Inspection: Regularly inspect the pouch for any signs of wear, tears, or damage to the sealing mechanism. If any damage is found, do not use the pouch.
5. Troubleshooting
Water Leakage:
If you suspect water has entered the pouch during a waterproof test or use:
- Immediately remove the pouch from water.
- Dry the exterior thoroughly before opening.
- Inspect the sealing mechanism for any debris, cracks, or improper closure.
- Perform another waterproof test with tissue paper. If it continues to leak, the pouch may be damaged and should not be used.
Touchscreen Unresponsive Underwater:
This is a common occurrence due to water pressure. The touchscreen may not function as expected when submerged.
- Use the physical volume buttons on your smartphone to control the camera (e.g., to take photos or start/stop video recording).
- Ensure there are no large air bubbles trapped between the phone screen and the pouch, as this can also affect touch sensitivity.
6. Product Specifications
| Attribute | Detail |
|---|---|
| Model Number | TW403-WNS-US |
| Waterproof Rating | IPX8 (Tested at 30 meters for 30 minutes) |
| Maximum Phone Size | Up to 9.0 inches |
| Floating Capacity | Smartphones weighing less than 350g |
| Material | Thermoplastic Polyurethane (TPU) |
| Color | Clear |
| Item Weight | 6.4 ounces |
| Package Dimensions | 10 x 9 x 1 inches |
| Special Features | Universal compatibility, Floatable, Adjustable Lanyard, Card Holder |

Image: Illustration demonstrating the superior floating capability of the YOSH pouch, supporting phones up to 350g, compared to older versions and other products.

Image: The upgraded double-layer airbag design of the YOSH pouch, providing protection against shocks if dropped, even on sand.
7. Warranty and Support
YOSH is committed to improving your shopping experience. For any questions, concerns, or issues regarding your product, please contact YOSH customer support. Refer to the product packaging or the official YOSH website for specific warranty information and contact details.
You can visit the YOSH Store for more information: YOSH Official Store
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