Anyone building a rounded bun or topknot who wants consistent shape and volume, including people with fine or thin hair that won't hold a full-looking bun on its own, and stylists doing repeatable updos for clients.

The value here is in the multiplier: because all three donuts are identical, doubling or tripling them up is how you scale up bun size, rather than needing to buy a separate large-format donut. That also means a spare is on hand if one gets misplaced or worn out.

1. Gather hair into a ponytail at the height you want the bun, and secure with an elastic.
2. Thread the ponytail through the centre hole of the donut and slide it down to sit near the base of the ponytail.
3. Spread the hair ends evenly over the outside of the foam ring.
4. Wrap small sections of hair around and over the donut, tucking ends under as you go, until the foam is fully covered.
5. Secure with bobby pins spaced around the ring.
6. For a larger bun, stack a second or third donut onto the ponytail before wrapping.

• Pro: all three donuts are the same 3.5" size, so stacking two or three scales the bun up without buying a second, larger ring.
• Pro: foam surface is designed to hold wrapped hair in place without the slipping a bare hair tie or bun can have.
• Con: only one size is included, there's no smaller ring for a petite bun or a thin ponytail.
• Con: the foam can show through if hair coverage is thin or the donut color doesn't match the hair shade closely.