ROCKBROS Bike Saddle Bag Seat Bag Bicycle Bag Under Seat Bike Accessories Storage Pouch Ultralight Cycling Wedge Pack for Road Mountain MTB Foldable Bike

It is made of good quality material (I haven't used it under the rain yet). It has reflective bands to improve visibility. The size is perfect to go under the bicycle's saddle. It actually doesn't interfere with the look of the bicycle at all, it compliments it very well. Please bear in mind that it is a small bag for under the saddle so space is limited to small items. I have put these items together and they fit. A credit card wallet, house keys, earbuds case and a small packet of tissue paper.

small but useful

It's smaller than I expected, but decent quality, I actually wanted it to hold my puncture repair kit so I have everything on the bike in case of emergency running a tubeless set up. I'm not convinced that it's entirely secure but yet to test

very good i like it

Simple and useful. Small and slim but big enough for a multi tool and energy bar. Nice clip that attaches to the underside of the seat helps with quick removal when washing.

They said is small. Not true. It is very, very, very small

good quality and easy to use .

Smaller than expected but works well for basic tools

Nor like the images

Super small. Like fits an extra tube that is taken out of the box. If you need uber small, this is for you!

Material muito bom, encaixe perfeito mais deixa a desejar no tamanho. No ideal seria com espaço para pelo menos uma câmara de ar e uma chave multiuso. Triste escolha de um ou outro.

This Rock Bros under-seat bag is great! I have read some criticizing its size...IT'S SUPPOSED TO BE SMALL!! It is perfect for your go-to tire flat fix bag. It is almost tear-drop shaped so that it tucks up under the seat oh so well. In mine I hold: (1) 700x25 inner tube, 1 nozzle for CO2 cartridges (2 of those as well-each 16g,) 3 tire levers, and 3 allen wrenches for all the sized bolts, etc. that my Giant road bike might need. From the photos I supplied you can see how well it tucks under the seat, allowing for rear light underneath it that really lights up the reflective bottom of the bag as well. There is a little tab on the back that allows for another reflector to be hung, but I wasn't able to find one that looked and fitted well, so the round bag reflector already there does a good enough job for me. The affixing velcro tabs were a bit long (better that than too short...) so I used scissors and cut them down to size! This bag is meant to be for a job like I am giving it. I hope to never have to open it. It looks great and provides reflection as a bonus. I have a different bag up front for cell phone, keys, i.d., and power bars. It would be a disaster to have to reach around back while on the bike to retrieve such things! If you are looking for a minimalist bag to carry what I have described on your road bike, this is for you...

This bag is the perfect size for packing a spare tube, CO2, and tire wrenches. But, as one of the previous reviewers noted, the bag unzips itself during a ride. I've taped it shut, but that seems like a serious design flaw. As an update, ROCKBROS got in touch with me and offered a full refund, which was really nice. So, I'll upgrade my review by a star.