Top Reviews

"This is the first chin strap that keeps my mouth closed all night."

February 24, 2010

"My husband has had good results with this cap. It is comfortable and keeps his hair neatly. The adjustible velcro works well."

January 5, 2010

Product Overview

The PAPcap Chinstrap is a comfortable solution to "mouth breathing". This chinstrap utilizes a cotton cap that conforms around your head and uses a built in, soft flannel chinstrap to secure your jaw.

Manufactured by Pur-Sleep.

1% of Chinstrap product buyers choose this product.

Product Features

The PAPcap Cotton Chinstrap is worn beneath the headgear (such as an undergarment) and provides comfortable padding that helps stabilize your CPAP mask. A soft flannel chinstrap cradles the chin and can be adjusted using the Velcro attachments on the cap.

The cap comes in two sizes, Small/Medium and Large/Extra Large. The Small/Medium cap fits most users and the Large/Extra Large is deeper and provides an additional half inch in length. The chinstrap is the same for both sizes and is approximately 18.5 inches from end to end.

The PAPcap also comes with a Velcro tube retainer that helps secure tubing for masks like the Mirage Swift LT.

Return On Warranty Issues Only


Product Specifications

Suggested Sizing


  • fits head circumference between 21" to 22.25" inches
  • fits hat sizes between 6.75 to 7 1/8"

Large/Extra Large

  • fits head circumference between 22 5/8" to 24" inches
  • fits hat sizes between 7.25" to 7.75"

Chinstrap Length (End to End): Approx. 18.5 in. always offers these services:

  • 8 am to 8 pm CST Toll Free Phone and Email Support
  • 24 hour access to our Support Forum
  • Learning Center for information on sleep apnea and cpap equipment
  • Consumer Purchasing Trends Reports
  • Warranty Services for all items purchased through
  • Insurance Compliant Invoices
  • Free Prescription Request System

Important Tips currently stocks the solid blue color only.

Chinstrap Length Update

In 2016 the manufacturer updated the length of the chinstrap portion of the PAPcap from 20.5 inches to 18.5 inches.

CPAP Video & FAQ

Frequently Asked Questions (FAQs)

I breathe through my mouth, what are my options?
If you are a mouth breather, you can wear most masks with a few adaptations. The nasal pillow, nasal prong or nasal mask can be worn with a chinstrap. A full face mask or hybrid mask can be used without a chinstrap because the seal covers your nose and mouth. A full face mask will allow you to breathe through your mouth or through your nose.

If you have or develop chronic sinus problems, a full face mask or an oral face mask are the ones to try. Oral masks work best for mouth breathers with blocked nasal passages. You must use a heated humidifier with the oral mask. sells the Oracle HC452 Oral CPAP mask.

If you are a mouth breather who does not want to or cannot wear a chinstrap, please see our recommended masks for Mouth Breathers.
What is the purpose of a chinstrap?
Nasal delivery devices are the preferred mode of delivering CPAP air. They are smaller, lighter and usually more comfortable, with many styles and sizes to choose from.

When using a nasal device with a CPAP, it is imperative that the mouth remain closed for the pressure to be maintained and the therapy to be effective. Most people will automatically keep their mouth closed while on CPAP, but some are unable to do so, at least in the beginning of the therapy.

Use of a Chinstrap is the first response to opening the mouth during sleep. It is worn in addition to the CPAP mask to hold the jaw up and help keep the mouth closed.

Even with the use of a chinstrap, some people are still able to breathe through their teeth and lips. If so, a Full Face Mask is an option worth considering.

Here are some recommended chinstraps:

Ruby-Style Adjustable Chinstrap with Extension Strap
Deluxe-Style Chinstrap
Premium Chinstrap
Halo Chinstrap
What styles of chinstraps are there?
A basic chinstrap cups the chin and has narrow straps that connect at the top of the head, usually with Velcro. It works best for those who sleep on their side and who do not open their mouth very much. The straps may fall forward or backward on the head if not held in place by the mask headgear. An example of this type of chinstrap is the Sullivan Chinstrap.Sullivan Chinstrap

For greater strength, a wider chinstrap is available. The width of the strap is sufficient to cup the chin, and narrow straps are available to attach across the forehead to keep the chinstrap from falling back, as well as across the back of the head to keep it from falling forward. This style of chinstrap is more stable, but it may cover the ears. An example of this type of chinstrap is the Premium Chinstrap.Sullivan Chinstrap

Another style of chinstrap is a series of straps that cup the chin at a lower angle for greater support, and include the stabilizing straps in the design. An example of this type of chinstrap is the Deluxe Chinstrap. Deluxe Chinstrap
Why is air leaking from my mouth?
Air leaks from the mouth whenever the mouth is opened during CPAP therapy. This occurs for many reasons, but a very common one is due to nasal irritation from the CPAP airflow.

The correlation between the lack of humidification and mouth leaks is a topic being heavily researched. Studies are now being conducted on the hypothesis that a large amount of mouth leakage is caused by the following cycle:
  • CPAP therapy is used with ineffective or no humidification.
  • The nasal membranes are unable to adequately condition the increased airflow and after a few minutes the airway and nasal passages become dry.
  • To remedy the dryness and obtain moisture, the body uses the mouth to breathe.
  • CPAP air follows the path of least resistance and leaks out of the open mouth.
  • The air leaking through the mouth causes more dryness.
  • Patient wakes up feeling tired with significant dryness in mouth and dry, swollen nasal passages.

The answer to this cycle is humidification. If the mouth continues to open during sleep, a chinstrap may be needed to hold the jaw up so that the mouth can close. If mouth breathing continues, a full face mask that covers the nose and mouth is indicated.
Why is my mouth dry in the morning?
Dry mouth is a sign that you are opening your mouth while you sleep. If you use nasal mask, breathing through your mouth bypasses any humidification you may be using so increasing the heat will not be effective. Breathing through your mouth while using a nasal mask reduces the benefit of the CPAP therapy.

First be sure the mask is not leaking. If it is six to nine months old and leaking, try replacing it. If it is new and leaking, we can help you get a better size.

If your mask is new and NOT leaking, try a chinstrap to keep your jaw up and mouth closed. If a chinstrap doesn't solve the problem, try a full face mask that covers your nose and mouth.

If you use a full face mask and have a dry mouth, try adding a heated humidifier to add moisture.
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