---
title: "Polly Smith, a co-inventor of the sports bra, spent a decades-long parallel career as a Jim Henson Company costume designer"
type: "claim"
status: "seedling"
audit_status: "capture-verified | The National Inventors Hall of Fame biographical profile was read at capture (2026-07-09) with the verbatim quotes below; not independently re-fetched at headless promotion. Biographical/uncontested claim resting on a Tier-3 institutional source."
source_url: "https://www.invent.org/blog/inventors/polly-smith-sports-bra-designer"
source_title: "2022 NIHF Inductee Polly Smith: The Skillful Designer"
source_author: "National Inventors Hall of Fame"
source_date: "2026-07-09T00:00:00.000Z"
source_quote: "brought on as a costume designer for The Muppet Show ... enjoyed a decades-long career with the company, going on to design for Sesame Street"
source_tier: 3
provenance: "Promotion from 10-inbox/raw/2026-07-09-hop-waldo-scifi-to-muppets.md, 2026-07-11 (headless)"
writer_model: "claude-opus-4-8"
origin: "batch"
derived_from: ["10-inbox/raw/2026-07-09-hop-waldo-scifi-to-muppets.md"]
date_created: "2026-07-11T00:00:00.000Z"
tags: ["invention-history","biography","cross-domain-bridge","apparel","puppetry","women-in-stem","hop"]
---


Polly Smith is credited as a co-inventor of the first commercial sports bra — she described her own role in building the 1977 prototype as "I was the fabrication" — and, separately, worked for decades as a costume designer for the Jim Henson Company. Per the National Inventors Hall of Fame, she was "brought on as a costume designer for The Muppet Show" and "enjoyed a decades-long career with the company, going on to design for Sesame Street." The invention itself — prototyped by sewing two men's jockstraps together — is treated in [[claim-first-sports-bra-1977-sewn-from-two-jockstraps]]; this note is the distinct biographical bridge rather than a re-statement of that claim.

The bridge matters because it links two otherwise unconnected invention domains through a single person: 1970s women's athletic apparel (the [[claim-first-sports-bra-1977-sewn-from-two-jockstraps|Jogbra]], and the biomechanics that later formalized it in [[claim-breast-displacement-figure-eight-motion-capture-2009]]) and the entertainment-technology world of Jim Henson's shop, which independently built the animatronic/CG control device in [[claim-henson-1988-waldo-realtime-cg-puppet-control]]. Smith worked in costuming, not the Creature Shop's electronics, so the connection is institutional and biographical, not technical — but it is the person-hook that surfaced the whole waldo/animatronics thread.

As an uncontested biographical claim on a Tier-3 institutional profile, the note clears its sourcing floor but stays a seedling pending corroboration of the specific productions and dates.

> [!note] Seek's commentary:
> The most surprising thing in the capture is the least technical: the sports bra's "fabrication" co-inventor was moonlighting (or day-jobbing) as a Muppets costumer. Cross-domain bridges through *people* are cheaper to find and easier to over-weight than bridges through *mechanisms* — this one is real but thin, a shared employer rather than a shared idea. — Seek