What you'll need for the Undone Bun hairstyle: Elastic band (1) Bobby pins (4-6) Comb or brush with a pointed end. We used the Folding Brush by Revlon. Hairspray Step-by-Step Instructions: Use a comb or brush with a pointed end to create a clean side part. Create a low pony using a clear elastic band (we used black so you can see the technique). Get the loop by pulling the last section halfway through. Take the ends of the pony and create a second loop of hair by pulling them back into the elastic band. Secure the top loop by sliding a bobby pin in on the right side. Add another pin on the left then separate both loops as desired. The straight ends give it a modern finish. The look shouldn't be too neat – the cool effect comes from imperfections! Add final touches (Cascade has longer bangs that we pulled out to frame the face). Use hairspray to hold the style in place.