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Theo G-String Harness Zoom

Theo G-String Harness

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Imagine a strap on harness without all the buckles and straps. “For complete control all of the time, sexy and fashionable... the Theo is the only harness you will ever want!” Strap-on players who prefer a g-string style harness will be thrilled with the patented Theo Harness.

The Theo G-String Harness comes with two internal mini-‐vibe pockets, positioned to pleasure both partners.

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Availability: In stock

Regular Price: $189.95

Special Price $188.00

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free delivery

Free delivery on all orders over $150

Free batteries

Free batteries included


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Easy no hassle returns policy

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Free luxury lube samples

Product Description


The SpareParts Theo harness was created with the fashion conscious in mind, it's an absolutely gorgeous thong style strap on harness.

It's single strap gives you total control over your dildo while giving a sensual, sexy and delicate look. It's breathable fabric means it's comfortable enough for extended wear and no metal parts means it's travel safe and easy to wash. It can even be used in the bath or shower, wherever the moment takes you.

The stretchable elastic O-ring is able to fit dildos of different shapes and sizes including doubles and hold them firmly in place. The Theo also includes two internal mini-vibe pockets positioned just above and below the O-ring, this improved design allows for extra vibration stimulation for both the wearer and the receiver.

The belt is secured with velcro allowing the harness to fit a wide variety of body shapes and features a small 'condom' pocket at the back for storing condoms or lube.

Fully washable the harness is fully hygienic and sanitary and comes with an attractive satin pouch to store your harness.

Hand-crafted and ethically manufactured in the US it's suitable for Vegans!

Sizing Table

A20-50" / 50-127cm12-18" / 33-45cm
B35-65" / 89-165cm21.5-27" / 55-68cm


Start with measuring for the perfect fit. For Theo you will need to consider Belt measurements (hips), groin measurements to determine which Theo will produce the best fit for you, or your partner.

Measuring for the belt

To measure which size is best for the wearer; first consider where you will be wearing it whether it’s on your waist (high ride) or on your hips (low ride).

If you prefer to wear your harness high, instead of low (please be aware many wearers like to wear their harness low as they want it to sit on their clitoris so it allows for stimulation where ever possible); measure around your waist instead of your hips.

Wrap the measuring tape around your hips (or waist if applicable), where you would wear your belt. Take the number where the tape measure completes and crosses over itself. You should add a few (3-4) inches to this measurement for size fluctuation and room for sizing adjustment. Take the measurement and see size chart above for Belt and determine which belt would be best. (You should be able to select a size that is reflective of your belt size.)

Measuring for the thong strap

To measure which size is best for the wearer; first figure out where you will be wearing it on your hips (or waist if applicable). The best way to do this is to put on a regular belt, as this will help you to have a place to start and finish measurement on the next step.

Next you should take your tape measure and start by taking the end of it and holding it in the center of the belt (in line with your belly button). Slide the measuring tape between your legs. You want to stretch the measuring tape straight and taught to the center of the back of the belt (around where your tail bone is).

Take the measurement, and then subtract 7 inches, this should give you the length of leg strap you need for the harness to fit securely but still be comfortable.

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