Lynmark® 2X Washable Bed Pads - Non-Slip Waterproof Incontinence Mattress Protector with Extra Long Tucks - Ultra-Absorbent Oeko-Tex Certified Cotton Underpads for Bedwetting - Full (34" x 54")

I bought a similar item and use them under the sheet. Under. Over. Either way works. Under adds sheet washing, but it’s worth it to me that my loved one does not complain about their use, https://www.amazon.com/dp/B0DHZVPJW6?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1