ECU crazy comfortable platform mules by Kirk - Ease in brown color in size 10. They are super secure as they grab the foot from all sides. The inner sole is soft and you feel as if you are walking on clouds. Very stylish, minimal and open to various combos. See pics for details. The "stain-like" area in the inner sole is the way I purchased them, it is in the leather. I am selling a decent amount of my personal clothes as we are planning to move abroad in two years to a much smaller and easily manageable space. I love good quality clothes and I take care of them. Please check out my closet. I will be posting often for quite some time. Please let me know if you need more info. designer heels, genuine leather, leather, brown, soft, sturdy, party, work, cocktail, every day, classic, elegant, minimal, stylish, heel stitch, sexy