A total of 1 review of this product on Reddit.
I’d say yes flat sheets are essential for hygiene purposes.. especially if you’re a hot sweaty sleeper.
Check out these sheet sets they both come wiith fitted, flat sheets and pillowcases
Bed Sheets Set by The August Company, Luxury Hotel Quality Satin Embroidery Queen 4 Piece Bed Sheet Set with 17 inch Extra Deep Pockets, Hypoallergenic Eco Friendly Super Soft Long Stapled Combed/Brushed Cotton Percale Blend Bedding Set-Wrinkle/Fade/Stain Resistant (Grey, Queen) https://www.amazon.ca/dp/B07NTK59HV/ref=cm_sw_r_cp_api_i_.qdmFbCR3RHT0
Bed Sheets Set by Bamboo Home, Natural Bamboo Viscose Rayon Blend Solid Queen 6-Piece Bed Sheets Set with 15 inch Extra Deep Pockets, Healthy Hypoallergenic and Antibacterial Eco Friendly Cool Comfortable Ultra Soft Silky Bamboo Bedding Sheets-Wrinkle/Fade/Stain Resistant (w/ 4 Pillowcases) (Queen, Blue) https://www.amazon.ca/dp/B07X51WY55/ref=cm_sw_r_cp_api_i_1wdmFb41FA7E5