This is good. Although I bought 30 cm, I can afford the size and I will not have anything better than anything else. It is almost unlikely to collapse and it is likely to be used next summer rather than this summer.
I bought it as a sandal placed on the edge. Even if it gets in the rain, it does not soak up and the size is perfect as a chance to catch on with quite relaxed eyes. Direct sunlight is raining and it is injury, but deterioration is not seen in 3 months from purchase.