Its a bit tricky to put on. The pulley system is very sturdy and durable. I sent it back and ordered one size larger and I still didn?t like the way it fit. It?s was easy to put together, it just took a little time. I definitely recommend the brand but this style is made for a fuller foot. Just know your taking a gamble when buying this. No where in the Amazon description did it say "ALEXA BUILT IN". 5 so I went with the size 38. I felt they could be really comfy with the memory foam if I bought the correct size. More of a solid slipper that u can wear inside or out.