I love Havaianas! I've used them for decades! They don't change colors! They last years!! I can use them all day and all night and no problem in the sand or in the city. What desapointed me this time is that they are green not yellow as they are called. Maybe is because I saw them in my tablet and not on my computer screen. I thought I had chosen the yellow traditional Havaiana.... They are neon green!!