Haven't seen this in person but this seems to be one of the most highly recommended bags - lighterweight than the bogg bag but the same waterproof features!
Simple Modern Beach Bag Rubber Tote
I love that this one is so big and you have a place for your hat if you'd like to take it off for a bit!
The Original Natural Straw Traveler Hat Bag
The nautical look and the perfect place for a hat!
Navy Striped Sunhat Size Traveler Tote
Love this and its perfect for the days you don't want to lug too much to the beach or pool!