Have for my child's bicycle seat Qibbel the "Sunnybaby 10600 raincover" ordered from Amazon for just 5,90. It is made of colorless film and fits like a glove over the entire seat. He shall likewise wind no chance abzuwehen him. Folds down small or simply zusammenknautschen. Done. But think that he is not fit so well on very large child seats. Hope now has a long useful life ;-)