Swiss brand Hanro has developed a new range of underwear made of sea island cotton.

The lingerie and nightwear label hand-picked cotton fibres from the British West Indies and Caribbean islands to produce a basic collection of T-shirts, spaghetti tops and briefs for women.

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The new range is an extension of Hanro’s sea island cotton range for men, which was unveiled last year.

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Sea island cotton, also known as gossypium barbadense, isn’t commonly used to make fashion garments. In fact, the fibers make up just 0.0004 % of total cotton production.

It is a tropical, frost-sensitive perennial plant that produces yellow flowers and has black seeds. It grows as a small, bushy tree and yields cotton with unusually long, silky fibers.

The length of the fiber is an important criterion for spinning, as shorter fibers are more difficult to spin than longer ones, the former also resulting in more hairy yarns.

Hanro has highlighted the use of sea island cotton in a special hologram on its packaging.

The new women’s range will be available in store and online from January 15, 2017.