Ghost Posture Strap | Slim Posture Trainer You Wear Under a Shirt
Ghost Posture Strap | Slim Posture Trainer You Wear Under a Shirt
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Stand taller. Nobody has to know why.
The Ghost Posture Strap is a slim back strap that sits flat under a tee, button-up or hoodie. It gently draws your shoulders back as a reminder to sit and stand tall at your desk, in class or on your commute.
- Low profile: thin, breathable mesh designed to disappear under everyday clothes
- Adjustable fit: shoulder and waist straps with hook-and-loop closures
- Flexible back stays keep the strap flat along your spine
- Material: 60% polyester, 35% nylon, 5% spandex
- Colour: black
Sizing (natural waistline): S 26–34 in · M 34–41 in · L 41–49 in. See the size chart in the photos.
How to use: start with 20–30 minutes a day and build up to 1–2 hours. Think of it as a reminder, not a fix: pair it with the posture work in the Training Arc.
Free US shipping from a US warehouse, usually 3–7 business days after a 1–3 day processing time.
This is not a medical device and is not intended to diagnose, treat or cure any condition. If you have back pain or an injury, talk to a doctor before use.

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We offer a 30-day return window on all purchases. If your order doesn’t meet your expectations for any reason, send it back within this period. If you need help with a return, email support@undercoverfitnessco.com and we’ll sort it out.