Aurorae Yoga Non Slip Rosin Bag Stop Slipping on your Mat Now; Increases Gripping Power; Absorbs Perspiration No Odor, Non Sticky. Made in USA All materials derive from Nature; Rosin formula derives from trees, plants and some rocks (calcium carbonate) Works incredibly well with our Yoga Sport Micro Fiber Towel to keep you from slipping on your mat Rated #1 Best of the Best Yoga Mats by BestReviews.com. Check out our latest Yoga Mat development: Aurorae "ULTRA" Super Sized Extra Long 78"; Extra Wide 26" and 1/4" Thick for comfort and Safety. Non Slip Rosin and Carry Strap included.