The design is absolutely poor as there are multiple areas that rub the back of the heel raw. My sandals are a size 6 though. Aggiorno la recensione con le foto della nuova colorazione che ho acquistato come regalo per un amico, queste hanno una nuova confezione con pochette ed una ottima resa cromatica. I really liked when they introduced the "squishy" reef. They are a bit narrower than others so if you have particularly wide feet these may not work for you. They are not too warm or too cold. Me llegaron en 4 días después de pedirlo, estoy muy contenta podré dormir con audífonos para escuchar ASMR sin que se me enreden y hacer otras actividades con ellos. Do not buy, even for $15. With simple explanation on the front and back, you remember that CCA is a sister company to Knowledge Zenith (KZ) and as such, they put more into the product. Not the best, not the worst.