Review on ROCKBROS Bicycle Saddle Bag - Under Seat Bike Bag - Strap-on Cycling Wedge Pack - Mountain Road Bike Seat Storage Bag, 0.75L by Bob Souza

The zipper on the bottom to increase the width is useless. The bottom isn't flat after opening and it doesn't do anything along the length and the size of the door stays the same. The zippered tailgate is difficult to open but is very weatherproof. I thought I bought the largest size but it's definitely smaller than other brands I've bought. A small key pocket in the tailgate would have been nice too, but no. And the length will hardly hold my phone. It won't be on the floor. It should be put on other things in the bag. Looks good, can withstand a lot and is weatherproof. I gave it 3 stars.