Voucher worth 300 euros, valid in one of the "Royal Extension" salons "Royal Extension: the must-have hair extension specialist Since 2008, Royal Extension has been transforming hair and hairstyles with high-quality extensions accessible to everyone. As a family-run business, Royal Extension has already won over more than 200,000 customers and works with leading hairdressers and celebrities. Voucher worth 300 euros valid in any "Royal Extension" salon.