These Wren socks are luxuriously soft, comfortable, and high-quality purple bamboo socks. Made from breathable bamboo fibre, they feature charming wrens perched all over a rich purple background.. Wrens may be one of the UK's smallest birds, but they're full of character. Known for their surprisingly loud song and energetic nature, these tiny birds can often be spotted darting through hedgerows, woodlands and gardens. These delightful little birds now feature all over cosy and comfortable socks!. They make excellent work socks, gym socks, or dress socks — or a thoughtful, colourful gift for any bird or wildlife lover.. A minimum of £500 a year from all Bare Kind RSPB socks sold will be donated to the RSPB, a registered charity in England and Wales, number 207076, and in Scotland, number SC037654.