Britax Car Seat Waterproof Liner - Moisture Wicking Fabric + No Slip Grip + Machine Washable + Crash Tested

I was hesitant to buy this as it appeared that most of the positive reviews were from people that had not experienced accidents in the seat. I have been potty training my almost three year old for almost a month. We are doing well but still have the occasional mishap. I actually bought this cover for an upcoming trip where (fingers crossed) she would be able to make it over two hours without going potty. The cover arrived tonight and just for kicks I put it in her car seat (Britax Marathon). It fit perfectly. At this point we had somehow managed to not have any accidents in the car. Not even two hours after having the cover on the car seat, it was tested. We had a short outing and upon arriving home, I noticed her jeans were wet. Not feeling confident (after reading the reviews describing this as nothing more than a paper towel) I yelled for my husband to check the car seat as I cleaned my little pee monkey up. He brought in the cover and said that the only pee that got on the actual car seat was a little on the buckle where the cover has a hole (you can see in the product pics it's where the buckle feeds through). We were pleasantly surprised. I will note that my daughter was wearing jeans that probably aided in the absorption. Anyway, the cover is now hanging in our laundry room drying. I am satisfied with the $13 investment!Update- 12/2015- had this car seat cover a couple of months and daughter just threw up all over herself and car seat. This seat protector performed perfectly as we were able to remove it and just clean the straps that harness her in (we were two hours into a three hour trip through winding mountains). She had thrown up all over her pants but nothing got on her actual car seat due to this seat cover. I'm thinking we will keep this seat cover on her car seat even after she is done with potty training just to protect against other things like getting sick or spilling juice, eat.

I purchased 3 carseat liners to test them myself. The Britax Seat Saver Waterproof liner, the Summer Infant total coverage car piddlepad and the Summer infant deluxe piddle pad. I put them on our high chairs, poured 1/4 cup water on each of them and waited 5 minutes to see what would happen. The Britax soaked in all the water, but the bottom side was totally dry. The Summer infant deluxe piddle pad came in 2nd, while it soaked in some of the water some stayed beaded up on top of the fabric. None leaked through the bottom. Finally, the Summer total coverage piddlepad came in last. None of the liquid soaked through, it all stayed beaded up on top. So if it was urine, taking a kid out of the seat it would have run all over and still made a mess. No liqud soaked through the fabric so I can't really say if the bottom liner is waterproof or not. We are returning both summer piddle pads and purchasing more of the Britax for both of our cars.FYI if you are considering the summer piddle pads, they are exactly the same size (though one advertises extra large waterproof protection). The same pattern is used to make both pads. The Britax has the most coverage out of all 3 models. I hope that helps!

This is four stars because my son hasn't actually peed in it yet, so I can't say how well it will do actually containing the mess. If it does as well as promised, when it occurs I will change it to five. But as to how it fits in a Britax car seat, it's just about perfect. I never have any problems with it scrunching up under my son or twisting around under him in the seat. It stays in place when I pull him out, and he seems to not even notice it's there which is what I was hoping for. He's particular about his seats. I don't know how well it works in other types of car seats/booster seats but as it was made by Britax I imagine it's going to fit the best in that particular brand of seats. The materials seems very durable and high-quality thus far, but again it hasn't been 'used' yet so it hasn't been washed either. We'll update this when we have a more 'comprehensive' review of this product. ;)Edit One: So, after over a year of use I have a few more things to add. I have now potty trained a boy and a girl using this product, and have opposing views on this item depending on which gender you have. For my boy, he only had two accidents while in the car using this potty pad. However, both times the accident went outside of the area protected by the pad. I believe this has mostly to do with the fact that he's a boy. The leakage would begin on the strap that runs up between the legs (and is not protected by the potty pad) and would then soak down into the rest of the seat. Obviously, as any parent of a boy knows, the pee goes everywhere, so I guess short of those awful plastic pants no one uses anymore finding the perfect 'catch-all' product probably isn't going to happen. As for my daughter, she's had a few accidents in it as well, and for her it's done much better. We haven't had any leakage or spillage onto anything else, and it washes and dries really well. I do air dry mine after washing, just to be safe, but it doesn't take long.In Summary: Awesome for girls! Less so for boys. The average of 5 stars and 3 stars is 4, so the rating remains. I still would recommend this in general for smaller children. I bet this would have saved me a couple of car seat cleanings when poo-splosions happened, and taking apart car seats to wash them is an absolute pain!

I bought this for my Britax car seat, which I had bought knowing I’d eventually buy this car seat protector. 99% of these are after market, which means they have NOT been crash tested, especially with each individual seat. This has been, and my toddler finds it comfortable. I will say that the back folds down at times which is annoying. Thankfully she hasn’t had an accident in it yet, but I know we’re protected if/when she does. I 100% recommend this to anyone who has a Britax car seat and is thinking about potty training. I intend to give mine to my nephew when he is ready (they also have the same seat).