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English translation of an article originally published in Japanese on May 12, 2021. Read the Japanese original (Japanese). Product information and dates refer to the original article. Images and manufacturer videos may contain Japanese.
Before choosing an extra-thin design
When combining tape-fastened adult diapers with incontinence insert pads, check the outer diaper’s thickness and how easily the pad fits inside. Thin designs can reduce bulk around the crotch, but absorbency and intended pad use differ by product. This article introduces five thin or pad-compatible products whose official manufacturer information was checked on October 2, 2026.
Labeling differs between retail products and those for hospitals and care facilities. Choose according to actual use, as well as the figures shown.
Products by manufacturer
Unicharm · Lifree
Comfortable Dry Cover Type
A cover design used together with an incontinence insert pad. Its absorbent core is minimal because pad use is assumed, so no number-of-voids guide is given. Features include a neat crotch shape created by 3D shaping slits and stretchable fastening tapes.
| Size | Hip size | Absorbency guide (manufacturer’s figures) |
|---|---|---|
| S-M | 56～106cm | Use with a pad |
| L | 81～128cm | Use with a pad |
Source: Unicharm “Lifree Comfortable Dry Cover Type”
Nobiru Fit® Thin Lightweight Tape-Fastened Diapers
The manufacturer’s guide is 2 voids. Features include stretchable “2x Nobiru Tape®” and a structure that accommodates a pad. Use with an incontinence insert pad designed for tape-fastened adult diapers.
| Size | Hip size | Absorbency guide (manufacturer’s figures) |
|---|---|---|
| S-M | 56～106cm | 2 voids |
| L | 81～128cm | 2 voids |
Source: Unicharm “Nobiru Fit® Thin Lightweight Tape-Fastened Diapers”
Livedo Corporation · Refre
Rakunobi Fit Tape-Fastened Type
Features an “extra-thin absorbent core” and guards that hold the pad down to reduce gaps.
| Size | Hip size | Absorbency guide (manufacturer’s figures) |
|---|---|---|
| S | 57～95cm | 2 voids |
| M | 65～104cm | 3 voids |
| L | 85～121cm | 4 voids |
Source: Livedo Corporation official product page
Daio Paper · Attento
Thin Tape-Fastened Diapers That Also Prevent Back and Side Leaks <scheduled for release October 21, 2026>
The previously listed “Thin Super Fit Tape-Fastened” product was discontinued in September 2025. Daio Paper announced that its new thin tape-fastened product, intended for use with overnight pads, would launch nationwide on October 21, 2026. The new product’s manufacturer-stated guide is approximately 2 voids.
| Size | Hip size | Absorbency guide (manufacturer’s figures) |
|---|---|---|
| M | 70～95cm | Approximately 2 voids |
| L | 90～125cm | Approximately 2 voids |
Source: Daio Paper announcement, September 30, 2026
Kami Shoji · Elmore Ichiban
Thin Cross-Tape-Fastened Diapers
A thin tape-fastened product for hospitals and care facilities. Its thin absorbent core reduces crotch bulk and is also intended for use with incontinence insert pads. The tapes can overlap or cross when fastened.
| Size | Hip size | Absorbency guide (manufacturer’s figures) |
|---|---|---|
| S | 57～87cm | Approximately 460 mL |
| M | 70～110cm | Approximately 480 mL |
| L | 85～125cm | Approximately 530 mL |
Source: Kami Shoji “Elmore Ichiban Thin Cross-Tape-Fastened Diapers”
Nippon Paper Crecia Acty
Tape-Fastened Type for Use with Pads
Designed for use with incontinence insert pads in hospitals and care facilities. Features double waist gathers at the back and abdomen, overlapping fastening tapes and standing leak guards.
| Size | Hip size | Absorbency guide (manufacturer’s figures) |
|---|---|---|
| SS | 50～85cm | Total absorbency: approximately 650 mL |
| S-M | 57～87cm | Total absorbency: approximately 650 mL |
| Smart M | 65～100cm | Total absorbency: approximately 900 mL |
| M-L | 77～110cm | Total absorbency: approximately 950 mL |
| L-LL | 92～125cm | Total absorbency: approximately 1,250 mL |
Source: Nippon Paper Crecia “Tape-Fastened Type for Use with Pads”
Total absorbency needs careful interpretation. It describes absorption across the entire absorbent surface, while the absorbency guide is a practical estimate for use. A conversion from total absorbency to a practical absorbency guide is roughly 50–70%. Ask the manufacturer for a product-specific conversion.
Selection points and precautions
First check hip size, then look for large gaps around the legs or back.
When adding a pad, check the product instructions and whether it fits inside the outer diaper’s standing leak guards. Cover designs assume use with a pad.
The suitable combination and change timing depend on urine volume, posture, the presence of feces and skin condition. Do not extend change intervals solely on the basis of the number of voids; change according to soiling and skin condition.
Summary
If you intend to use a pad and want the thinnest possible outer diaper, first check the differences between cover designs and thin tape-fastened designs. The products introduced here differ in sizes, absorbency guides and release status. Check each manufacturer’s official page for the latest specifications before purchasing.
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