For two stroke sacks of Roba bought for our little one and are very satisfied. The zipper works 100% and also holds since more than half a year. The on and off also works very well. Here it should be mentioned that can be opened only a shoulder strap, but also works wonderfully. The sleeping bag is not so thick that ensures freedom of movement. Anyway, you can use it in combination with a thicker pajamas even in winter. Our Conclusion: For this price just a great sleeping bag. Compared to the twice as expensive "brand sleeping" - absolutely equivalent (the purpose) Regulations.
