Thick good quality fabric and quality stitching. The blue is more of a light sky blue rather than a grayish blue but I love it.Great product, affordable price, quality and fast shipping and delivery. I build cornhole board as a hobby and I will continue buying bags from this seller!These bags seem to be well made. They are completely filled, so there’s no a lot of give (ie, they hold their shape), and boy, do they slide! It’s a challenge to keep them on the board, and as others have mentioned, the bags will sometimes straddle the hole and refuse to drop in. I don’t think this fabric was washed before use, so I’m hoping that over time the fabric finish will wear off and the bags will become a little more friendly. Until then, we’ll just have to try to modify our throwing technique accordingly.UPDATE: Literally, second day of use, one of the bags has already ripped. Not good.UPDATE 2: We contacted the seller who was very responsive and has promised to send a replacement bag immediately. Good service!Also, the finish on the bags is starting to break down a bit so they are a little easier to throw. I expect with use they will be just fine.The good:These are exactly as described. Strong duck cloth material, good seams and a nice look. Each of my bags is really close to 15 oz, which is within the the 14-16 oz range required. The bags are also exactly 6" x 6" so the size is correct as well. They are full of plastic beads so the filling won't get wet and mold or breakdown or get eating by pests. These seem to be high quality.The bad:The plastic beads are less dense than corn (I assume) so as a result the bags are stuffed very full to make the appropriate size and weight. We call them "the chunky bags" They bounce and roll instead of slide and are so stiff they will get stuck in the hole corner to corner, and actually block the hole. Corn bags have way more play and will just fold up and fall through.I am not a professional by any means, but in going from corn filled bags to these I was very disappointed in the way they played. It's a good idea to fill with plastic beads, since chipmunks or squirrels ravaged one of my sets before I stared keeping the bags in plastic containers, and so I don't need to worry about that if we forget to put them away. These are fine, but if you're looking for bags that play like corn filled, skip these.Nice, durable, casing. Perfect weight and no loose threads.Very well build, will buy again.one of our bags ripped after one outing, probably 2 hours of play :(I bought 2 sets of these weatherproof bags (plastic fill) after buying a set filled with sand from another supplier. Although the sand bags are also waterproof, they definitely don't have the same feel as corn bags when throwing them. These bags feel (to me) like broken in corn filled bags. Just the right amount of "chunkiness".I bought the bags for a set of boards I made for a friends wedding gift. I haven't been able to play much with these bags or see how they have held up but I was very happy with them.