From Flags for Good: Garden flags are double-sided so you can see the design from either side. They are constructed of three layers, two art layers sandwiching a blackout fabric in between.  Single Sided Flags are durable 200D polyester (most flags you'll find on the internet are cheap ~75D) with two grommets on the hoist edge. In our testing, we selected 200D as the perfect flag material; anything heavier doesn't fly well and the "back" doesn't get enough ink, anything lighter feels cheap and wont last very long.