The Theo is a strong and stylist thong style harness that is seriously sexy! Beautifully handcrafted using sensual and luxurious materials, the Theo is a harness is silky soft. The adjustable thong strap and belt ensures a secure and comfortable fit, that will make you radiate seductive confidence. The o’ring is stretchable and is simple to manoeuvre. Toys can be inserted and removed with ease. The o’ring is compatible with a variety of dildos, including double dildos. With the Theo, there are endless ways to play!
  • Vibrating option
  • Double dildo compatible
  • 77% nylon & 23% spandex
  • Elastic O'ring fits dildos 1.10–2.25 inches 
  • Suitable for packing
  • Machine washable
Special Price $114.95 Regular Price $124.95 -8%
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The Theo harness is handcrafted in the US and designed by Spareparts Hardwear. Fashionable and fun, the Theo is a harness that embodies comfort and confidence. Made with soft and breathable fabrics, the materials draw moisture from the body which keeps it cool when things get hot! The lightweight materials ensure a comfortable wear. It features an adjustable thong strap and belt, so it be altered to fit the body securely. The Velcro belt has a second elastic pull feature that locks your toy into position.

The o’ring is simplistic and stretchable, toys can be easily slid in and out. It accommodates a variety of dildos, including double dildos measuring 1.10 to 2.25 inches in width. The durable and elasticated o’ring doesn’t lose its shape. There are two internal pockets located above and below the o’ring, these conveniently hold mini bullet vibrators. When used with bullet vibes, these fall behind the toy and not between partners. This way both partners can enjoy the tantalising trembles of the vibrations without feeling the bullet vibes themselves.

The Theo is hand or machine washable, but not suitable for drying in the tumble dryer and comes with a satin storage pouch. The Theo harness is available in black in sizes A and B, which covers sizes XS to 5X. For exact sizes, please refer to the sizing chart.





(low waist inches)
A 20-50 4-16
B 35-65 10-20


If you choose the wrong size, we will offer a harness return (please contact us for return process). Please note products must be new, unworn and in their original OUTER PACKAGING.


Size chart:
Spareparts harnesses
  • Joque
  • Theo
Hip or low waist measurement:
Stand on a level surface with feet together. Measure around fullest part of hips and bottom (approximately 7”-9” below high waistline). It is the largest part of your lower waist.
TIP: if you are between two sizes, choose the smaller size. The harness needs to fit snugly to your body.
Size Low Waist or Hip (in) Low Waist or Hip (cm) US/North America Australia
A 20-50 51-127 4-16 6-18
B 35-65 89-165 10-20 12-22
Harness Body
For additional help and information please visit our Videos.
The Theo strap-on is hand- and machine-washable. Best to avoid the clothes dryer.

77% Nylon / 23% Spandex