Common non-slip features include suction cups to hold mats in place, embossed or textured surfaces for better grip, perforations or drain holes to let water escape, and non-skid or strong-grip backing materials.
Care varies by material: many mats recommend spot or wipe cleaning and line-drying, some specify hand wash and lay flat to dry, and heavier fabric bath rugs typically allow machine wash and tumble dry. Follow the product label for best results.
Hard diatomaceous-earth tiles absorb standing water quickly, air-dry rapidly, and are described as inhibiting microbial growth. Fabric bath rugs are machine-washable heavyweight textiles that require regular laundering and can retain moisture until cleaned.
Designs that reduce mold and mildew include drain holes or perforations to let water escape, quick-dry materials that air-dry rapidly, and materials described as inhibiting microbial growth to limit fungal development.
Attachment methods include suction cups, non-skid or strong-grip backings, rubber or latex backings, and neoprene backings; some products list no backing at all.