With side zipper. The color is gray (I personally think it's more stylish than black). The heel is about 5cm and I remember it being easy to wear, enough to run in. The heels have been repaired (around 1000 yen at Mr. Minit, etc.) They can still be used. Selling at a bargain price to clear out my closet. It's from the Aqua Bell series, so it's designed to be resistant to water penetration on snowy days. Original price: around 40,000 yen. Please refrain from purchasing if you are overly concerned about details.