Smushees contain polystyrene micro-beads to help them conform to your foot as you walk making them very comfortable. They are lightweight and very cushioned. They have an indoor/outdoor sole and are covered with a soft fabric. They come in six fun summer colors: Hot Pink, Lemon, Grass, Turquoise, Black, and Tangerine.
Check them out on their website at www.smartdogscomfort.com.