SDX. THE WEEKENDER COLLECTION is specifically designed for a single install like a long weekend of fun. No commitment, no high purchase price, and no damage. THE WEEKENDER COLLECTION can last for a few weeks with proper care and maintenance. If you are looking for longer-term extension wear at an affordable price, check out our LIVED IN COLLECTION. SDX is on a mission to make extensions as affordable as a cut and color. Join The Hair Extensions Revolution!