SpareParts Tomboi Harness Black/Black Nylon

The SpareParts Tomboi harness reimagines strap-on wear as effortless, everyday comfort. Cut like athletic briefs, it slides on and off in seconds—no buckles, no dangling straps, no pinched skin. The super-durable O-ring accepts toys from 1.25" to 2.25" (3.17–5.71 cm) in diameter, while two internal mini-vibe pockets and an internal packing strap make it equally suited for pack-and-play, daily packing, or spontaneous sessions. Two internal fabric panels can be positioned between the toy base and your skin for added comfort. A built-in internal support band keeps everything locked in place during even vigorous movement, and moisture-wicking 77% nylon / 23% spandex fabric keeps you cool whether you wear it for an hour or all day. A hidden inside pocket stashes condoms, a bullet vibe, cash, or anything else you want close at hand. The entire construction is metal-free and fully waterproof, so it goes straight in the shower, pool, or anywhere adventure takes you—and right through airport security without a second thought.

SpareParts Tomboi Harness features:

• Athletic brief cut—no buckles, straps, or metal hardware
• Super-durable O-ring fits toys 1.25"–2.25" / 3.17–5.71 cm in diameter
• Compatible with a variety of toys, including double dildos
• Two internal mini-vibe pockets for added stimulation
• Internal packing strap for pack-and-play use
• Two internal fabric panels to separate toy base from skin if desired
• Easy toy switching in and out during play
• Built-in internal support band for secure fit and full control
• Hidden inside pocket for condoms, a bullet vibe, or personal items
• Moisture-wicking fabric keeps you cool and dry
• Lightweight and breathable for all-day wear
• 100% waterproof and shower/pool friendly
• Airport-friendly non-metal materials

Specifications / Size & material

• Material: 77% nylon, 23% spandex
• Body safety: Non-metal, skin-friendly nylon-spandex blend; no rubber, latex, or phthalates stated
• O-ring diameter (all sizes): 1.25"–2.25" / 3.18–5.71 cm
• O-ring circumference (all sizes): 3.92"–7.07" / 9.96–17.96 cm
• Size XS — Low waist: 26"–28" / 66.04–71.12 cm
• Size S — Low waist: 29"–32" / 73.66–81.3 cm
• Size M — Low waist: 33"–37" / 83.82–93.98 cm
• Size L — Low waist: 38"–40" / 96.52–101.6 cm
• Size XL — Low waist: 41"–44" / 104.14–111.76 cm
• Size 2X — Low waist: 45"–48" / 114.3–121.92 cm
• Size 3X — Low waist: 49"–52" / 124.46–132.08 cm
• Water resistance: Fully waterproof
• Color: Black/Black
• Brand: SpareParts

Intensity & Experience Level

Level: Beginner | Sensation: Restrictive / pressure

The pull-on brief design removes every technical barrier associated with traditional harnesses, making it the most forgiving entry point into strap-on play. Experienced users will also appreciate it for its spontaneity and all-day wearability.

Who is this product for?

• Strap-on beginners: Anyone exploring harness play for the first time who wants an intuitive, no-fuss design with zero confusing straps or fasteners.
• Sensitive skin and sensory-aware users: People who prefer a soft, seamless, buckle-free fit that won't chafe or irritate during extended wear.
• Everyday packers and pack-and-players: Those who want a single garment that functions as all-day underwear and a fully capable play harness.
• Users seeking body confidence and gender affirmation: The athletic, gender-affirming cut adds comfort, security, and style in intimate and everyday settings alike.
• Users with limited dexterity or mobility differences: The simple pull-on design is accessible for people who find buckled or laced harnesses difficult to manage independently.

How to use the Tomboi Harness?

1. Select your size: Use the low-waist measurement guide above to choose a size that fits snugly without digging in.
2. Step in: Pull the Tomboi on exactly like a pair of briefs—no adjustments, buckles, or fasteners required.
3. Insert your toy: Feed a flared-base dildo or compatible toy through the reinforced O-ring from the front.
4. Adjust the fabric panels: Position the two internal fabric panels between the toy base and your skin if you prefer a buffer layer.
5. Comfort checkpoint: Check that the waistband sits securely at your low hip without rolling, the O-ring holds the toy firmly without excessive gap, and there is no pinching or pressure anywhere around your hips or groin.
6. Engage the internal support band: Confirm the built-in support band is holding the toy at the angle you want, especially before partner play or vigorous movement.
7. Begin play: The harness stays in place through thrusting, position changes, or extended packing sessions.
8. To stop or remove: Simply step out of the harness as you would any briefs. Remove the toy from the O-ring before washing.

Techniques & ways to play

• Solo packing: Wear the Tomboi throughout the day as everyday underwear for gender affirmation or confidence—no toy needed.
• Solo practice: Insert a toy and use a mirror to get comfortable with angles and thrusting motion before a partnered session.
• Doggy style: Maximises thrust control and depth; the secure internal band keeps the toy on-axis through powerful movement.
• Person-on-top (rider): The receiving partner controls rhythm and depth; great for intimacy and eye contact.
• Edge of bed: Standing position allows strong thrust angles and full-body support for both partners.
• Vibe pocket play: Tuck a bullet vibe into one of the internal mini-vibe pockets to add stimulation for the wearer simultaneously.
• Dom/sub dynamic: The wearer holds penetrative control; agree on signals or a safeword before the scene and check in before switching toys mid-play using the easy-swap O-ring.

Pairs well with / Complete the scene

• Flared-base dildos: Any dildo with a base diameter within the O-ring range (1.25"–2.25") will fit securely—a flared base is essential to prevent slippage.
• Double dildos: The harness is specifically compatible with double-ended designs for simultaneous internal stimulation of the wearer.
• Bullet vibrators: A compact bullet slipped into the internal vibe pocket adds hands-free stimulation for the harness wearer.
• Water-based lubricant: Required when pairing with silicone toys; keeps play smooth without degrading your toy's material.
• Thin panty liner: Placed inside the harness during all-day wear to reduce laundry frequency and increase comfort.
• Strap-on toy collections & harness-compatible dildo ranges available at The BDSM Store.

How to clean and care

• Machine washing: Wash cold in a mesh delicates bag with mild detergent. No bleach or fabric softeners.
• Hand washing: Recommended after heavy use to extend harness life and prevent pilling or stretch degradation from rough machine cycles.
• Drying: Hang dry or tumble on low heat only.
• Lube compatibility: The harness fabric does not contact lube directly. Follow toy-specific rules: use water-based lubricant with silicone toys.
• Storage: Store flat in a drawer or hang on a hanger. Avoid excessively folding the O-ring area to preserve its shape and tension over time. Keep harness separate from toys during storage.

Additional information

• Versatility: Serves equally well as daily-wear packing underwear, a pack-and-play harness, or a ready-to-go strap-on for spontaneous sessions.
• Stimulation for the wearer: Internal vibe pockets allow the wearer to enjoy physical stimulation alongside the psychological satisfaction of giving.
• Accessibility: Pull-on brief design is ideal for users with limited dexterity, hand strength, or mobility challenges—no fine-motor buckle work required.
• Extended intimacy: Supports penetrative play independent of erection or ejaculation, helping couples maintain connection and confidence across a range of physical circumstances.
• Durability: Nylon-spandex construction is built for repeated use; hand-washing after heavy sessions is recommended to maximise lifespan and prevent fabric pilling.

Special considerations / warnings

• Mobility: Stepping in and out of the harness requires some bending and balancing; users with significant lower-body mobility limitations may need assistance.
• Toy base requirement: Always use a dildo with a flared base inside the O-ring. A non-flared toy can slip through during use.
• O-ring fit: Only use toys whose base diameter falls within 1.25"–2.25". Toys outside this range will not be held securely.
• Sizing: An incorrectly sized harness can shift during use. Measure your low waist carefully before purchasing.
• Skin sensitivity: Although the fabric is smooth and seam-reduced, discontinue use if any skin irritation or chafing develops.
• Waterproof use: The harness is waterproof; ensure any toy used in water is also rated for aquatic use.

18+ only. For consensual adult use.