To grade vintage activewear condition for resale, run three checks before you write a word of the listing: test elastic recovery at the waistband and cuffs, inspect mesh panels under raking light for pilling, holes, or yellowing, and look for salt-ring staining in the underarms and waistband under bright, angled light. These three checks account for many of the returns that hit activewear listings graded Excellent or Very Good, and none of them show up in a standard flatlay photo.
Activewear fails differently than denim or knitwear. A pair of Lululemon leggings can look flawless on a hanger and still draw a not-as-described return the day a buyer puts them on and the waistband rolls down. A mesh-paneled Nike running jacket can photograph clean and still carry a permanent salt stain that only shows under direct light. Grading this category means testing function, not just looking at fabric.
Why Activewear Grades Differently Than Other Categories
Most clothing categories fail in fabric first: pilling, fading, seam wear. Activewear fails in three places at once, and two are invisible in photos. Elastic recovery is a Functional Elements and Structural Integrity issue. Technical mesh degradation is a Fabric Condition issue specific to synthetic knits. Salt and sweat residue is an Odor & Cleanliness issue that behaves nothing like a normal stain.
Activewear buyers are unusually return-prone. They buy for fit and performance, not just looks, so anything that fails in wear reads as a bigger betrayal than a cosmetic flaw on a blouse. That includes a waistband that won't stay up, a mesh panel that has gone crunchy, or a sweat smell that reactivates once body heat hits it. A stain on a dress shirt is a Cosmetic Appearance problem. The same stain on a sports bra is a functional and hygiene problem, and buyers treat it that way.
Vintage pieces add one more wrinkle. Older spandex, especially pre-2000s elastane and early Lycra blends, can degrade even in storage. Elastic that has sat in a closet for 20 years may crumble or go gummy without ever being worn, so never assume