This is a great bag to carry MELT rollers in as well as oversized yoga mats. It is very light weight but sturdy enough.
I have The Big Mat from Lululemon and could not find a bag to fit it anywhere. Then I found this one online and it's more than big enough to fit my mat (with extra room to spare) and is water resistant to protect it in the rain, which is nice. Only thing missing is a small pouch to fit keys and wallet.