Here's some areas to focus on when designing yours:
Entice your web visitor with headlines;
Use easy-to-scan bullet points;
Include plenty of white space;
Increase your font size to promote readability;
Read more: http://www.shopify.com/blog/8211159-9-simple-ways-to-write-product-descriptions-that-sell#ixzz2l6GHlvkh