June 21 is World Yoga day. Take a deep breath, spread out your yoga mat, stretch out your limbs and get in position for your favorite asana. Millions of people the world over swear by the healing and restorative power of yoga. If you haven’t made yoga a part of your life, here’s reason why you should. Whether you’re a beginner or a pro, this comprehensive list of yoga essentials will guide you in your quest.