These are flip-flops (chanclas!) in honor of the Alex (the main male character) of my book "Inn Close Proximity." In the book he hates them and goes as far as banning them.
From the manufacturer:
Prepare for an adventurous and carefree summer with a pair of colorful slippers that are created just for you! The rubber sole is lined with a soft fabric to make sure you feel comfortable wherever your day takes you.
• Rubber sole
• Customizable 100% polyester fabric lining
• Black Y-shaped rubber straps
• Toe post style