SpareParts Tomboi Harness Black/Black Rayon

The SpareParts Tomboi Harness is a brief-style strap-on harness designed to slide on and off like a pair of everyday underwear — no buckles, no dangling straps, no pinched skin, and no fuss. Constructed from a lightweight 85% rayon, 15% spandex blend, the fabric wicks moisture away from the body so you can wear it comfortably for extended sessions or even all day long. The super-durable O-ring accepts toys ranging from 1.25" to 2.25" (3.18 cm – 5.71 cm) in diameter, meaning it fits a wide variety of dildos including double-ended styles. Two internal fabric panels sit between the dildo base and your skin, reducing friction and adding comfort, while built-in internal support keeps your toy secure and gives you total hands-free control. Mini-vibe pockets let you add a bullet vibrator for extra stimulation, an internal packing strap makes it pack-and-play ready, and a hidden inside pocket stashes condoms, cash, or anything else you need close at hand. Because all materials are non-metal, the Tomboi is fully airport-friendly.

SpareParts Tomboi Harness features:

• Athletic brief cut: slides on and off without buckles, straps, or chafing hardware
• Fabric: 85% rayon, 15% spandex — lightweight, breathable, and moisture-wicking
• Super-durable O-ring: accommodates toys 1.25"–2.25" / 3.18–5.71 cm in diameter
• Two internal fabric panels: separate dildo base from skin to reduce friction
• Mini-vibe pockets: hold bullet vibrators for added stimulation
• Internal packing strap: supports pack-and-play use
• Hidden inside pocket: discreetly stores condoms, cash, or small items
• Built-in internal support: ensures a secure, controlled fit throughout play
• Easy toy switching: swap toys in and out without removing the harness
• Compatible with double dildos: fits a wide variety of harness-ready toys
• Non-metal construction: airport-friendly and TSA-safe
• Available in XS through 3X

Specifications / Size & material

• Material: 85% rayon, 15% spandex
• Body safety: fabric harness; rayon-spandex blend is skin-friendly and moisture-wicking
• 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
• XS low waist: 26"–28" / 66.04–71.12 cm
• S low waist: 29"–32" / 73.66–81.3 cm
• M low waist: 33"–37" / 83.82–93.98 cm
• L low waist: 38"–40" / 96.52–101.6 cm
• XL low waist: 41"–44" / 104.14–111.76 cm
• 2X low waist: 45"–48" / 114.3–121.92 cm
• 3X low waist: 49"–52" / 124.46–132.08 cm
• Color: Black/Black
• Brand: SpareParts

Intensity & Experience Level

Level: Beginner — Sensation: Restrictive (supportive, body-hugging)

The Tomboi's pull-on design and stretch fabric make it one of the most forgiving harnesses available — there is nothing to buckle, tighten, or adjust, so new users can focus entirely on pleasure rather than gear. Experienced wearers will appreciate the secure, stable fit and the flexibility to layer in vibes or packers for more advanced play.

Who is this product for?

• Beginners: anyone stepping into strap-on play for the first time who wants a simple, no-hardware harness that fits like underwear
• People with limited hand or arm mobility: the buckle-free, step-in design requires minimal dexterity and delivers full control without fiddly adjustments
• Trans and nonbinary individuals: comfortable for all-day packing, gender-affirming wear, and discreet play-ready use
• Couples exploring pegging or role-switching: quick toy swaps and a secure O-ring make it easy to change up toys or positions mid-scene
• People managing erectile dysfunction or premature ejaculation: enables hands-free, penetrative intimacy and can reduce performance pressure

How to use the SpareParts Tomboi Harness?

1. Choose your size: measure your low waist and match it to the size chart above to ensure a snug, slip-free fit.
2. Slide it on: step into the Tomboi and pull it up just like a pair of briefs — no straps, buckles, or adjustments needed.
3. Insert your toy: push the base of your dildo through the front O-ring. The two internal fabric panels will cradle the base and keep it separated from your skin.
4. Add a bullet vibe (optional): slip a small bullet vibrator into one of the mini-vibe pockets for added stimulation during play.
5. Comfort checkpoint: before partnered play, wear the harness solo — try riding a dildo mount or pillow mount to confirm fit, toy stability, and comfort. Adjust toy size if needed; use a dildo stabilizer ring if the toy feels loose.
6. Play and switch toys: toys can be swapped in and out during a session without removing the harness.
7. Stop/release step: when you are finished, simply pull the harness down and off. Remove the toy from the O-ring before laundering.

Techniques & ways to play

• Solo warm-up: wear the Tomboi while using a dildo mount to explore your range of motion and dial in comfort before partner play.
• Bullet vibe add-on: load a charged bullet into the mini-vibe pocket before play begins so stimulation is instant and hands-free.
• Doggy style (partnered): the form-fitting brief shape allows maximum hip movement and penetrative control.
• Face-to-face — sitting or standing (partnered): easy to shift angles and depth while maintaining full-body connection.
• On top / cowgirl (partnered): lets the harness wearer grind into their partner with total control and rhythm.
• Dom/sub dynamic: the Dom wearer retains full control of pace, depth, and toy choice; always negotiate toy size, positions, and boundaries with your partner before escalating intensity.
• Packing: use the internal packing strap to wear a soft packer discreetly under clothes for all-day gender-affirming wear.

Pairs well with / Complete the scene

• Harness-compatible dildos: any strap-on dildo with a flared base measuring 1.25"–2.25" in diameter, including double-ended styles
• Bullet vibrators: a small bullet vibe to load into the built-in mini-vibe pockets
• Soft packers: for pack-and-play use with the internal packing strap
• Dildo stabilizer ring: add grip and reduce toy movement if using a toy near the upper end of the O-ring range
• Condoms: use a base condom on your toy to protect the fabric from lube transfer and simplify cleanup
• Collections to explore: Strap-On Harnesses, Packing & Gender-Affirming Gear

How to clean and care

• Cleaning: machine wash cold on a gentle cycle, or hand wash with a mild detergent; wash promptly after use to prevent lube or fluid odors from setting in
• Drying: air dry flat, or tumble dry on a cool setting; avoid high heat to protect the spandex elasticity
• Lube compatibility: keep lubricant on the toy rather than the harness; placing a condom over the toy base helps prevent lube transfer to the fabric
• Storage: store flat or folded in an underwear drawer or toy bag; keep away from sharp hooks, velcro, and zippers to prevent fabric snags

Additional information

• Versatility: designed for strap-on play, packing, and all-day wear — fully functional in and out of the bedroom
• Wide size range: XS through 3X accommodates a broad range of body types
• Accessibility: step-in, buckle-free design is ideal for users with limited hand strength, finger pain, or flexibility restrictions
• Erectile dysfunction / premature ejaculation support: enables hands-free, penetrative intimacy and can help reduce performance anxiety for wearers
• Travel-friendly: non-metal construction will not trigger airport security scanners

Special considerations / warnings

• Mobility requirement: the wearer must be able to step into and pull the brief-style harness up to the hips; it is not a wraparound or adjustable-strap design
• Dexterity: minimal dexterity is needed, but basic reach to the hip and genital area is required for toy setup and fit checks
• Toy size limits: only use toys with a base diameter of 1.25"–2.25"; toys outside this range will not be safely secured by the O-ring
• Lube and fabric: avoid applying lubricant directly to the harness fabric; use a condom on the toy base to protect the material and extend harness life
• Heat caution: do not tumble dry on high heat or iron; high temperatures will degrade the spandex and distort the O-ring
• Inspect before use: check the O-ring and fabric panels for wear or damage before each session and replace if integrity is compromised
• 18+ only. For consensual adult use.