Here is a vintage magazine advertisement for a Flexible Flyer sled that was manufactured by the S. L. Allen & Co., in Philadelphia. The ad states that this sled is self-steering, you manage it without your feet on the steering bar, and it goes faster than any other sled. The ad is from the December 1893 issue of St. Nicholas magazine. 
Here is a black and white version of the sled from the ad. 
Click on images to enlarge.
Julie is a vintage enthusiast and a Photoshop addict who collects old books and new recipes.
Contact her at: theolddesignshop(at) gmail(dot)com
Love this image and the information that goes with it. Edna
Hi Edna,
I’m happy to know you love it. 🙂
Julie
love the sled ephemera too! thank you!