Casual Everyday Shoes with Drop-in Heel & Breathable Mesh Design, Lightweight & All-Day Comfort Lightweight, fun, trendy style. They convert from a regular shoe with the heal intact to pushing down the heel and making them into a mule. Here are comments from Amazon: Light, breathable and featuring an airy, all-mesh upper, the energetic Pehuea Li is always ready for adventure 2-IN-1 SHOE & SLIDE: This sneaker features our patented Drop-In Heel design where the heel can be folded down for slip-on convenience. Featuring flat laces, a soft, breathable mesh lining, and a non-marking ‘Wet Grip’ rubber outsole SIZE & FIT: The Pehuea Li sneaker runs slightly small, with a standard fit and high arch support. We recommend ordering the next size up. This sneaker features a dual-density anatomical PU footbed, offering extra cushioning for immediate step-in comfort by a guarantee against manufacturer’s defects for one full year from the date of purchase, including defects such as frayed or loose stitching and straps THE OLUKAI PHILOSOPHY: Behind every pair is the commitment to quality for those who wear them and those who craft them, and a commitment to designing shoes that offer style, durability and comfort from heel