The Chirp Wheel 3 Pack in 12", 10", and 6" sizes is a set of yoga props designed for unisex adults. Made from hard and EVA foam, these black wheels provide stretch relief and support during yoga practices. The medium/hard level of difficulty and indentation for spine feature make them suitable for various yoga activities. With a total weight of 5 lbs 9 oz, these wheels are lightweight and easy to handle, perfect for incorporating into your yoga routine.