SpareParts Tomboii Black/Black Rayon

The SpareParts Tomboii harness brief is designed to slide on and off like a pair of everyday underwear — no buckles, no dangling straps, no pinched skin, no fuss. Made from a luxuriously soft 85% Lenzing Modal Rayon and 15% Spandex blend, it hugs the body with a low-rise cut that stays put during play without sacrificing comfort. The front panel features two openings that accept most standard-base strap-on dildos and strap-on vibrators through adjustable O-rings ranging from 1.25" to 2.25" in diameter, giving you the option of a single angle or double-penetration configuration. Three internal bullet pockets let you add vibrating stimulation at the base, while a dedicated internal packing strap holds a soft packer securely in place for all-day gender-affirming wear. A built-in condom pouch rounds out the feature set. Available in sizes XS through 5X, the Tomboii is one of the most inclusive, versatile harness briefs on the market.

SpareParts Tomboii features:

• Buckle-free slide-on design: Pulls on like underwear — no chafing hardware or dangling straps.
• Compatible with most strap-on dildos and vibrators: Works with any toy that has a standard flared base fitting the O-ring range.
• Two front-panel openings: Choose your angle or use both for double-penetration play.
• Three bullet pockets: Add vibrating bullets for clitoral or base stimulation.
• Internal packing strap: Secures a soft packer for pack-and-play or all-day wear.
• Condom pouch included: Convenient built-in storage for safer play.
• Size-inclusive range: Available from XS to 5X with consistent O-ring sizing across all sizes.
• Sizing note: Order one size up if you fall between sizes.

Specifications / Size & material

• Brand: SpareParts
• Color: Black/Black
• Material: 85% Lenzing Modal Rayon, 15% Spandex
• Body safety: Soft, skin-friendly fabric blend; Lenzing Modal is derived from sustainably sourced wood pulp and is gentle against sensitive skin.
• O-ring diameter (all sizes): 1.25" – 2.25" / 3.18 cm – 5.72 cm
• O-ring circumference (all sizes): 3.92" – 7.07" / 9.96 cm – 17.96 cm
• Size XS — Low waist: 26" – 28" / 66.04 cm – 71.12 cm
• Size S — Low waist: 29" – 32" / 73.66 cm – 81.3 cm
• Size M — Low waist: 33" – 37" / 83.82 cm – 93.98 cm
• Size L — Low waist: 38" – 40" / 96.52 cm – 101.6 cm
• Size XL — Low waist: 41" – 44" / 104.14 cm – 111.76 cm
• Size 2X — Low waist: 45" – 48" / 114.3 cm – 121.92 cm
• Size 3X — Low waist: 49" – 52" / 124.46 cm – 132.08 cm
• Size 4X — Low waist: 51" – 56" / 129.54 cm – 142.24 cm
• Size 5X — Low waist: 57" – 60" / 144.78 cm – 152.4 cm

Intensity & Experience Level

Level: Beginner | Sensation: Restrictive (light compression) / Versatile

The Tomboii's slip-on design removes virtually all of the mechanical complexity associated with traditional strap-on harnesses, making it one of the most approachable entry points into harness play. The soft fabric is forgiving and comfortable enough for extended wear, and the adjustable O-ring range means most users can find a secure fit for their toy without fiddling with hardware — though some dexterity is still needed to dress and position the toy.

Who is this product for?

• Strap-on beginners: Anyone exploring harness play for the first time who wants a comfortable, low-fuss experience without buckles or straps.
• People with ED, premature ejaculation, or sensory differences: Provides a reliable way to enjoy and prolong penetrative intimacy without relying on erection or arousal.
• Queer and gender-diverse users: Offers a gender-affirming, flexible harness that doubles as everyday underwear or a packing brief.
• People with limited arm or hand mobility: The slip-on design reduces the need for complex fastening, making it more accessible than buckle-based harnesses.
• Anyone wanting low-profile, multi-purpose gear: Works for play, packing, and all-day comfort in a single garment.

How to use the Tomboii?

1. Select your dildo or vibrator: Choose a toy with a flared base that fits within the O-ring diameter range of 1.25" – 2.25".
2. Slide into the Tomboii briefs: Pull them on exactly like regular underwear — no extra steps required.
3. Insert your toy through the front panel: Thread it through one of the two openings for your preferred angle, or use both openings for double-penetration play.
4. Add a bullet vibe if desired: Tuck a vibrating bullet into one of the three pockets for added clitoral or base stimulation.
5. Check comfort before play: Adjust the toy's position and confirm the waistband sits comfortably at the low hip — everything should feel snug but not restrictive.
6. Pack and play setup: If packing, thread your soft packer through the internal packing strap for secure, realistic all-day wear.
7. To stop or remove: Simply slide the briefs down and off. Remove the toy before washing.

Techniques & ways to play

• Solo practice: Try it alone first — insert your chosen dildo, check the fit and angle, and practice thrusting motion to build confidence before partnered play.
• Face-to-face (missionary or standing): The low-profile design is excellent for close-body connection and eye contact.
• Doggy style: Provides strong leverage and good angle control; the brief stays in place without shifting.
• Spooning: The snug fit keeps everything aligned for slow, intimate vibration or gentle thrusting.
• Double penetration: Use both front-panel openings with two slim toys — start with slimmer options to get used to the sensation and spacing.
• Dom/sub dynamic: The wearer holds positional control; discuss toy size, depth, and pace with your partner before play begins and agree on a signal to pause or stop.
• All-day packing: Pair with a soft packer in the internal strap for gender-affirming wear that transitions seamlessly from daily life into play.

Pairs well with / Complete the scene

• Strap-on dildos: Any dildo with a flared base fitting the 1.25" – 2.25" O-ring range.
• Strap-on vibrators: Compatible with most vibrating strap-on toys with a standard base.
• Vibrating bullet vibes: Tuck one into the bullet pockets for hands-free stimulation.
• Soft packers: Use with the internal packing strap for pack-and-play or everyday gender-affirming wear.
• OhNut wearable rings: Add these to your dildo to limit penetration depth for more comfortable play.
• Water-based lubricant: Recommended for most dildo materials; keeps play smooth and easy to clean from the fabric.
• Collections to explore: Strap-On Harnesses & Accessories, Gender-Affirming Play.

How to clean and care

• Washing: Machine wash cold on a gentle cycle, or hand wash. Do not bleach or iron.
• Drying: Air dry flat or tumble dry on low heat. Avoid high heat to preserve the fabric's elasticity and shape.
• Lube compatibility: All lube types are safe for the fabric. Thoroughly clean silicone or oil-based lube off any attached dildos before storing to prevent residue staining on the brief.
• Frequency: Machine wash regularly to maintain fabric shape and remove lube residue that could affect long-term wear.
• Storage: Store in a clean drawer or a lingerie bag. Keep separate from silicone toys if any lube residue is present.

Additional information

• Accessibility: Well suited for individuals with limited hand or arm mobility, as the slip-on design eliminates the need to fasten buckles or thread straps.
• ED and prolonged intimacy: May be helpful for people who have difficulty maintaining an erection or experience premature ejaculation, by providing a stable, reliable means of penetration.
• Vaginal dryness: Combine with a lubricant and an insertable dildo for more comfortable penetration.
• Painful penetration: The harness provides stable, controlled thrusting that can be gentler than body-to-body pressure; use shallower toys or add OhNut rings as needed.
• Versatility: Functions as a strap-on harness, bullet-vibe holder, packing brief, and everyday underwear in a single garment.
• Durability: The Modal-Spandex blend is designed to hold its shape with regular cold washing and low-heat drying.

Special considerations / warnings

• Mobility requirement: Putting the Tomboii on and positioning a toy requires a degree of lower-body mobility and flexibility; consider your range of motion before purchase.
• Bullet vibe shifting: Bullets in the pockets may shift during vigorous use; secure with a small piece of fabric tape if consistent placement is important.
• Lube and toy material: Remove and clean silicone or oil-based lube from silicone toys thoroughly after each use to avoid residue transfer to the fabric.
• Dildo base compatibility: Only toys with a flared base within the 1.25" – 2.25" O-ring range are suitable; verify your toy's dimensions before use.
• Not a medical device: The Tomboii is not intended to diagnose, treat, or cure any medical condition. If you have pelvic health concerns, consult a qualified healthcare provider.

18+ only. For consensual adult use.