Source summary
Unicharm’s October 3, 2025 release describes stretch nonwoven fabric around the abdomen and a stretch design at the crotch in Lifree Premium adult pants, scheduled for Japanese release in early October.
The linked official product page also describes the stretch nonwoven construction. This account is limited to the confirmed material and structural features. The release’s body and footnote disagree over the location of elastic, so that disputed location is not resolved here.