SpareParts Tomboi Cover Brief Style Underwear Harness Nylon Red/Black
The SpareParts Tomboi Cover Brief Style Underwear Harness Nylon Red/Black delivers a streamlined blend of everyday underwear and secure strap-on functionality. This Tomboi Cover Brief Harness features a low-rise brief cut with a soft, wide waistband and adjustable leg straps, all crafted from durable red and black nylon. The harness keeps your favorite flat-base dildo steady without compromising comfort.
Key Features
- Underwear-Style Design: The brief-cut silhouette feels like regular underwear, providing a discreet, low-profile fit that slides smoothly under clothing.
- Adjustable O-Ring: A flexible 1.5-inch (3.8 cm) internal O-ring stretches to securely hold most flared-base toys, preventing slip during vigorous movement.
- Quick-Release Leg Straps: Two side-release buckles make this harness easy to put on and take off, even with a toy in place.
- Machine-Washable Nylon: Lightweight fabric resists stretching and cleans easily, maintaining its shape and color after repeated use.
- Dual-Color Accent: Red front panel with black side and back panels creates a bold, sporty look that goes beyond basic black harnesses.
Size & Fit Guide
This harness runs true to size. A 1.5-inch non-roll elastic waistband and adjustable leg straps allow a personalized, chafe-free fit. If you’re between sizes, consider sizing down for a snug, secure feel. The Tomboi Cover Brief Harness is not intended for use with double-ended toys or O-rings larger than 2 inches.
| Size | Low Waist / Waist Band | Hips | US / North America Size |
| XXS | 24″ – 30″ | 24″ – 35″ | — |
| XS | 26″ – 28″ | 26″ – 37″ | US 2 – 4 |
| S | 29″ – 32″ | 28″ – 39″ | US 4 – 6 |
| M | 33″ – 37″ | 30″ – 42″ | US 6 – 8 |
| L | 38″ – 40″ | 31″ – 43″ | US 8 – 10 |
| XL | 41″ – 44″ | 33″ – 46″ | US 10 – 12 |
| 2XL | 45″ – 48″ | 36″ – 50″ | US 14 – 16 |
| 3XL | 49″ – 52″ | 39″ – 54″ | US 16 – 18 |
| 4XL | 50″ – 56″ | 40″ – 56″ | US 18 – 20 |
| 5XL | 57″ – 59″ | 42″ – 58″ | US 20 – 22 |
Materials & Care
- Fabric: 80% nylon, 20% spandex with nickel-free metal hardware.
- Care: Machine wash cold, gentle cycle. Air dry or tumble dry low. Do not bleach, iron, or dry clean. Remove O-ring before washing.
- Storage: Store flat or folded; avoid hanging by straps to preserve elasticity.
Compatibility
The included O-ring works with most standard dildos and packers with flared bases up to 1.75 inches in diameter. For larger toys, you can swap in a 2-inch O-ring (sold separately). This Tomboi Cover Brief Harness is ideal for porous and non-porous materials such as silicone, glass, or metal – just ensure the base is flat. It’s not designed for strapless or double-ended dildos.
What’s Included
- 1 SpareParts Tomboi Cover Brief Harness Red/Black
- 1 1.5-inch flexible O-ring
- Storage pouch
All you need to start using the Tomboi Cover Brief Harness right out of the box.

















