aluslakana
An aluslakana is a bed linen item placed directly on the mattress as the base layer under the rest of the bedding. In Finnish usage it can refer to a fitted sheet with elastic corners that grips the mattress, or to a flat base sheet used under other linens. The primary function is to protect the mattress from wear and staining while providing a smooth, even surface for sleeping and for layering with top sheets, blankets, or duvets.
Materials and finishes vary by season and preference. Common fabrics include cotton and cotton blends, flannel
Sizes align with standard mattress dimensions. In many markets, widths correspond to common bed sizes such
Care typically involves machine washing on a suitable cycle, with common temperatures ranging from 40 to 60
Etymology: alus means under and lakana means sheet, reflecting its role as the base layer of bed