Love that these are all one mould. The arch is in the right place and comfortable and supportive to wear. They don’t slip and the straps comfortably hold the thing onto the foot firmly. True to size.
I really don't know how my family manages to lose water bottle lids - maybe they escape to live with the odd socks or the tupperware lids?? Anyway, being able to get replacement lids for good quality reasonable priced water bottles - EPIC!!