FAQ

Frequently Asked Questions

Product Information

What is the DYNACY nighttime mouthpiece?

The DYNACY nighttime mouthpiece is an adjustable oral device designed for use while sleeping.

It is designed to gently position the lower jaw forward, which may help maintain a more open airway and reduce snoring for some users.

Individual comfort and results may vary.

Is the DYNACY mouthpiece a treatment for sleep apnea?

No.

The DYNACY mouthpiece is not intended to diagnose, treat, cure, or prevent obstructive sleep apnea, central sleep apnea, breathing disorders, or any other medical condition.

Snoring can sometimes be associated with an underlying health condition. Please consult a qualified doctor, sleep specialist, or dentist if you experience:

  • Pauses in breathing while sleeping

  • Choking or gasping during sleep

  • Loud or persistent snoring

  • Morning headaches

  • Severe daytime sleepiness

  • Difficulty concentrating

  • Previously diagnosed sleep apnea

Do not discontinue or replace prescribed CPAP therapy or any other medical treatment without consulting your healthcare provider.

Does the mouthpiece completely stop snoring?

Results cannot be guaranteed.

The product is designed to help reduce snoring, but its effectiveness will vary depending on the user’s anatomy, sleeping position, cause of snoring, fitting, adjustment level, and consistency of use.

Some users may experience a noticeable reduction, while others may experience limited or no improvement.

Who is the mouthpiece intended for?

Unless otherwise stated on the product page, the mouthpiece is intended for adult users aged 18 or older.

Please consult a dentist or healthcare professional before use if you:

  • Have braces, retainers, dentures, implants, crowns, bridges, or other significant dental work

  • Have loose teeth, damaged teeth, gum disease, or ongoing dental problems

  • Experience jaw pain or have a temporomandibular joint condition

  • Recently underwent dental or oral surgery

  • Have difficulty breathing through your nose

  • Have been diagnosed with sleep apnea or another breathing disorder

  • Are pregnant or receiving ongoing medical treatment

  • Are unsure whether an oral mouthpiece is suitable for you

Can I use the mouthpiece with braces, dentures, or dental implants?

Please consult your dentist before using the product.

The mouthpiece may not be suitable for certain braces, removable dentures, loose dental work, missing teeth, implants, crowns, bridges, or other dental conditions.

DYNACY cannot determine whether the product is compatible with an individual customer’s dental condition.

How does the mouthpiece work?

The mouthpiece is designed to gently hold the lower jaw in a forward position while you sleep.

This positioning may help reduce the narrowing of the airway and the vibration of soft tissue associated with some forms of snoring.

The mouthpiece must be fitted, adjusted, and used according to the instructions supplied with the product.

How do I fit the mouthpiece?

Please carefully follow the fitting instructions included with the product.

Do not place the mouthpiece in boiling water, a microwave, dishwasher, or other heat source unless the supplied instructions specifically direct you to do so.

Incorrect fitting or excessive heat may permanently damage or deform the product.

If the mouthpiece causes significant pain, does not remain securely in place, prevents normal breathing, or cannot be fitted correctly, stop using it and contact us.

How long does it take to get used to the mouthpiece?

Adjustment periods vary between users.

It may take several nights to become accustomed to sleeping with an oral mouthpiece. Some users may initially notice increased saliva, dry mouth, mild pressure, temporary jaw stiffness, or minor tooth sensitivity.

Stop using the product and consult a dentist or healthcare professional if discomfort is severe, continues, becomes worse, or if you notice changes to your teeth or bite.

Can I adjust the mouthpiece?

If your product includes an adjustment mechanism, make only small and gradual adjustments according to the supplied instructions.

Do not force the adjustment mechanism or extend the mouthpiece beyond its recommended range.

Greater advancement does not necessarily produce better results and may increase discomfort.

How should I clean the mouthpiece?

Clean the mouthpiece after each use according to the care instructions supplied with the product.

Unless the instructions state otherwise:

  • Rinse it with cool or lukewarm water

  • Gently clean it using a soft toothbrush

  • Use mild, non-abrasive soap when necessary

  • Allow it to dry completely before storage

  • Store it in the provided case in a clean and dry location

Do not use boiling water, bleach, strong chemicals, abrasive toothpaste, alcohol-based cleaners, a dishwasher, or a washing machine.

How often should I replace the mouthpiece?

The product’s lifespan depends on frequency of use, teeth grinding, cleaning practices, storage, and normal wear.

Inspect the mouthpiece regularly. Stop using and replace it if it becomes:

  • Cracked or torn

  • Deformed

  • Loose or unstable

  • Rough or sharp

  • Permanently discoloured or difficult to clean

  • Damaged around the adjustment mechanism

Do not continue using a broken or damaged mouthpiece.

What materials are used?

Materials may vary depending on the product model.

Please refer to the individual product page and packaging for available information about materials, dimensions, care instructions, and product specifications.

Customers with known material sensitivities or allergies should consult a healthcare professional before use.

Orders

How long does order processing take?

Orders are generally processed within 3–7 business days after payment has been successfully received.

Business days do not include weekends or Japanese public holidays.

Processing may take longer during product launches, promotional periods, holiday seasons, or periods of high order volume.

Please note that processing time is separate from shipping time.

Can I change or cancel my order?

Please contact us as soon as possible at dynacyglobal@gmail.com.

We cannot guarantee that an order can be changed or cancelled after it has entered processing, been packed, or been transferred to the shipping carrier.

Please carefully review your product selection, quantity, contact information, and shipping address before completing your purchase.

Can I combine separate orders?

We cannot guarantee that separately placed orders can be combined.

Please contact us as soon as possible and include all relevant order numbers. If the orders have not yet been processed or packed, we will check whether combining them is possible.

Shipping-fee adjustments or refunds are not guaranteed.

Shipping

Where are orders shipped from?

DYNACY orders are generally processed and shipped from Japan.

Do you ship internationally?

Yes. We offer worldwide shipping to most international destinations.

Available shipping services, delivery options, and shipping fees will be displayed at checkout based on your delivery address.

Some destinations may be temporarily unavailable because of carrier limitations, postal restrictions, customs regulations, import restrictions, or service disruptions.

How long does shipping take?

Estimated delivery times after dispatch are:

  • Japan: 2–5 business days

  • Asia: 7–14 business days

  • United States and Canada: 7–14 business days

  • United Kingdom and Europe: 7–14 business days

  • Australia and New Zealand: 7–14 business days

  • Other international destinations: 14–20 business days

These timeframes are estimates only and are not guaranteed.

Customs inspections, public holidays, severe weather, local postal delays, transportation disruptions, and other circumstances outside our control may affect delivery times.

Will I receive a tracking number?

When tracking is available, you will receive a shipping confirmation email containing your tracking number or tracking link.

Tracking information may take several business days to appear after the parcel has been accepted by the shipping carrier.

Some economy shipping services may provide limited tracking, particularly after the parcel leaves Japan.

What happens if I provide the wrong shipping address?

Please contact us immediately at dynacyglobal@gmail.com.

We cannot guarantee that an address can be changed after the order has been processed, packed, or dispatched.

Customers are responsible for providing a complete and accurate shipping address. Additional shipping charges may apply if a parcel is returned because of an incorrect, incomplete, or outdated address.

Will I need to pay customs duties or import taxes?

International orders may be subject to customs duties, import taxes, value-added tax, handling fees, brokerage fees, or other charges imposed by the destination country or region.

These charges are not included in the product price or shipping fee unless clearly stated otherwise at checkout.

Customers are responsible for paying all applicable import-related charges.

Returns and Order Issues

Do you accept returns or exchanges?

Because mouthpieces are hygiene-sensitive oral products, products that have been opened, fitted, moulded, adjusted, placed in the mouth, worn, washed, or otherwise used cannot normally be returned or exchanged.

An unopened and unused product may be eligible for return if you contact us within 7 days of delivery and the product remains sealed in its complete original packaging.

Return eligibility is subject to our Return and Refund Policy and applicable consumer law.

Customers are generally responsible for return shipping costs unless the product arrived damaged, defective, or incorrect.

Please contact us before returning any product. Unauthorized returns may not be accepted.

Can I return the mouthpiece if it does not fit or does not reduce my snoring?

Once the product has been opened, fitted, moulded, adjusted, placed in the mouth, or used, it cannot normally be returned because of hygiene and safety considerations.

Individual mouth shape, dental structure, comfort, and results vary. We cannot guarantee that the mouthpiece will fit every customer or completely stop snoring.

Please review the product information, suitability guidance, and fitting instructions carefully before opening or using the product.

What should I do if my product arrives damaged, defective, or incorrect?

Please contact us within 7 days of delivery and provide:

  • Your order number

  • A clear description of the issue

  • Clear photographs of the product

  • Photographs of the outer packaging

  • A clear photograph of the shipping label

Please keep the product and all original packaging until we have reviewed your request.

Depending on the circumstances, we may offer a replacement, partial refund, full refund, or store credit.

What if my parcel is lost or marked as delivered?

First, please:

  • Review the tracking information

  • Confirm that the shipping address is correct

  • Check with household members or neighbours

  • Check with building management or reception

  • Contact your local post office or delivery carrier

If the parcel still cannot be located, contact us with your order number and tracking number. We will provide reasonable assistance with a carrier enquiry where possible.

DYNACY is not responsible for parcels lost because an incorrect or incomplete address was provided or for parcels lost or stolen after confirmed delivery to the address entered at checkout.

Safety and Use

What should I do if the mouthpiece causes discomfort?

Mild temporary pressure, increased saliva, dry mouth, jaw stiffness, or tooth sensitivity may occur while becoming accustomed to an oral mouthpiece.

Stop using the product immediately if you experience:

  • Severe or persistent pain

  • Bleeding or injury

  • Loose teeth

  • Significant jaw pain

  • Changes to your bite

  • Difficulty opening or closing your mouth

  • Difficulty breathing

  • An allergic reaction

  • Damage or breakage of the product

Seek advice from a qualified dentist or healthcare professional before using the product again.

Can children use the mouthpiece?

No. Unless the product page specifically states otherwise, the DYNACY mouthpiece is intended for adults aged 18 or older.

Keep the product, packaging, and small components away from children and pets.

Can I share my mouthpiece with another person?

No.

The mouthpiece is a personal hygiene product and must not be shared, resold after use, or used by more than one person.

Contact

How can I contact DYNACY?

For product questions, order enquiries, shipping concerns, or general assistance, please contact us at:

Email: dynacyglobal@gmail.com

When contacting us about an existing order, please include your full name and order number.

We aim to respond within 1 business day. Response times may be longer during weekends, Japanese public holidays, product launches, promotional periods, or periods of high enquiry volume.