Top 4 Highest Capacity Adult Diapers

Finding the right incontinence product starts with choosing the right level of protection. With Canada's largest selection of adult incontinence products, Healthwick offers a wide range of absorbency options to meet every need. For those managing heavy urinary or bowel incontinence, a high-absorbency adult brief can provide the reliable protection needed to stay comfortable and confident throughout the day.

To help narrow down your options, we've rounded up five of our best-selling adult diapers with some of the highest absorbency capacities available. While these products are generally bulkier than lighter protection options, they offer exceptional leak protection and are designed for maximum performance. All absorbency capacities listed are based on ISO laboratory testing.

Keep in mind that absorbency is only one factor when choosing the right product. A proper fit is just as important for preventing leaks and ensuring comfort. Be sure to explore our guide, 7 Reasons Your Brief is Leaking, for additional tips, or browse our full selection of adult diapers to find the best option for your needs.

Absorbency capacities are based on ISO laboratory testing and may vary by product size. Always review the product description before purchasing. If you need help choosing the right product, our knowledgeable customer service team is happy to assist.

#1) NorthShore MEGAMAX Tab-Style Briefs

Since becoming the first Canadian retailer to carry NorthShore Care products, Healthwick has proudly offered one of the brand's most trusted high-performance solutions: NorthShore MEGAMAX Adult Diapers. Designed for maximum absorbency and extended wear, the MEGAMAX combines premium features to provide up to 12 hours of reliable leak protection.

With an impressive maximum ISO-tested absorbency of up to 6,500 mL, NorthShore MEGAMAX is an excellent choice for managing heavy urinary or bowel incontinence. It is available in sizes X-Small to 3X-Large, with select sizes offered in Blue and Pink color options. Package sizes range from 10 to 12 briefs, depending on the size selected.

#2) Rearz Mega Inspire+ Adult Diapers

Rearz is a Canadian manufacturer known for producing premium, high-absorbency adult diapers. Designed for those managing heavy urinary or bowel incontinence, the Rearz Inspire+ InControl provides reliable protection for both daytime and overnight wear.

With a maximum ISO-tested absorbency of up to 5,300 mL, these plastic-backed briefs offer exceptional leak protection. Strong leg elastics help provide a secure, comfortable fit for added confidence throughout the day or night.

Available in sizes Small to X-Large. 12 briefs per package.

#3) BetterDry Adult Diapers

Previously known as ComfiCare, BetterDry Adult Diapers have become a trusted choice for those seeking maximum leak protection. These plastic-backed briefs offer up to 4,400 mL of maximum ISO-tested absorbency, making them an excellent option for both daytime and overnight use.

You may also see this product referred to as BetterDry M10 or BetterDry M10 Diapers.

Available in sizes Small to X-Large. 15 briefs per package.

#4) Abena Abri-Form White Foil Comfort Briefs

Abena is a trusted brand known for its high-quality, high-performance incontinence products. The Abri-Form White Foil Comfort Briefs are designed to provide reliable protection for individuals managing heavy to maximum urinary or bowel incontinence.

Featuring Top-Dry Technology and a maximum ISO-tested absorbency of up to 3,600 mL, these plastic-backed briefs help keep skin dry while providing excellent leak and odor protection. Four secure tabs ensure a comfortable, customizable fit for extended wear.

Available in sizes Medium and Large. 12–14 briefs per package, depending on size.

For Extra Absorbency…

Tranquility TopLiner Super-Plus Contour Booster Pads 

Tranquility TopLiner Contour Booster Pads are designed to add extra absorbency and extend the wear time of your favorite brief or protective underwear. With a maximum absorbency of up to 813 mL, their contoured shape provides a comfortable fit while delivering reliable added protection.

Available in a 32" × 14" contoured design. Latex-free. 12 booster pads per package.

NorthShore Booster Pads  

NorthShore Booster Pads are designed to add extra absorbency to your favorite brief or protective underwear, helping to extend wear time and provide added protection against leaks. Available in three sizes to suit different absorbency needs, these flow-through booster pads allow liquid to pass into the host product once they reach capacity. Each pad also features an adhesive strip to help keep it securely in place throughout the day or night.

Available in Small (443 mL), Medium (532 mL), and Large (621 mL) absorbency options. 30 booster pads per package.

Abena Abri-Let Booster Pads

These booster pads by Abena are a great product for adding extra protection to any adult diaper or pull-up underwear. The 500mL capacity of these booster pads make them a great option for those needing a bit of extra absorbency. 

Abena Abri-Let Booster Pads Abena Abri-San Air Plus Premium 11 Pads provide reliable protection for moderate to heavy incontinence. With up to 3,400 mL of maximum ISO-tested absorbency, these breathable pads feature 360° leak protection and odor control to help keep you dry and comfortable. Moderate Absorbency