Flax (Linum usitatissimum), from which linen is produced from, is an annual fibre and oil plant less than a metre high. Flax is part of the Linaceae family, which includes about 150 species from around the world. Flax is one of the world's oldest crops.

Properties of flax (linen) used as a textile are e.g. beautiful shine, strength and breathability. Linen absorbs moisture well, repels dirt and in addition, linen has a unique antibacterial property, which is used, for example, in hospital textiles. The old proverb "linen only improves with wear and wash" often surprises the linen wearer positively.