Here's an email I sent to Chris Ivy at Heritage. I have not heard back from him yet.

Hey Chris

I was interested in the Manute Bol warm up pants
Basketball Collectibles: Uniforms, 1990-91 Manute Bol Game-Worn Warm-Up Pants. From the time that he came to the NBA from his..
Can you tell me- what specifically attributes those to Manute? There's no number sewn in or written in the waistband.
Thanks
Eric Stangel