SpareParts Deuce Harness for Penis-Owners

The SpareParts Deuce is the first strap-on harness designed specifically for penis-owners. Built from a blend of nylon, spandex, and velcro, it features two separate openings at the front: an elastic, stretchy O-ring that accommodates a dildo of your choice, and a lower opening that fits around the wearer's own penis, functioning much like a soft cock ring. This dual-opening design means penetrative play can continue between erections, making it a practical and confidence-restoring solution for those experiencing erectile dysfunction or premature ejaculation. A discreet internal pocket in the flaps of the dildo opening holds a mini vibrator for added clitoral or perineal stimulation, while the leg straps lightly cross over the perineum for a pleasurable secondary sensation. The waistband and leg straps are fully adjustable, allowing for an extended and secure wear, and the quick-drying materials make it just as at home in the shower or bath as in the bedroom.

SpareParts Deuce Harness features:

• Dual openings: One stretchy O-ring for a dildo and one lower opening that holds the wearer's penis, acting as a soft cock ring
• Elastic O-ring: Expands and contracts to fit a variety of dildo diameters from 1.25" up to 2"
• Internal vibe pocket: Holds a mini bullet vibrator within the flaps of the dildo opening for extra stimulation
• Perineal leg straps: Lightly cross over the perineum for added pleasure during wear
• Fully adjustable: Waistband and leg straps adjust for a custom, stable fit across a wide range of body sizes
• Extended wear design: Comfortable enough to wear for long sessions or even under clothing
• Water play approved: Quick-drying nylon and spandex construction is safe for shower, tub, or pool play
• Four size variants: Size A Regular, Size B Regular, Size A Magnum, and Size B Magnum to suit different waist and thigh measurements

Specifications / Size & material

• Materials: Nylon, spandex, velcro
• Body safety: Fabric harness does not contain phthalates or latex; use a body-safe dildo and water-based lubricant with silicone toys
• Size A Regular — Belt: 20"–50" / 50.8 cm–127 cm
• Size A Regular — Leg straps: 10"–16" / 25.4 cm–40.64 cm
• Size B Regular — Belt: 35"–65" / 88.9 cm–165.1 cm
• Size B Regular — Leg straps: 14"–24" / 35.56 cm–60.96 cm
• Size A Magnum — Belt: 20"–50" / 50.8 cm–127 cm
• Size A Magnum — Leg straps: 10"–16" / 25.4 cm–40.64 cm
• Size B Magnum — Belt: 35"–65" / 88.9 cm–165.1 cm
• Size B Magnum — Leg straps: 14"–24" / 35.56 cm–60.96 cm
• Dildo opening diameter (all sizes): 1.25"–2" / 3.2 cm–5.1 cm
• Dildo opening circumference (all sizes): 3.92"–6.28" / 9.96 cm–15.95 cm
• Penis opening diameter — Regular: 1.5"–1.87" / 3.81 cm–4.75 cm
• Penis opening circumference — Regular: 4.71"–5.89" / 11.96 cm–17.96 cm
• Penis opening diameter — Magnum: 2"–2.37" / 5.1 cm–6.02 cm
• Penis opening circumference — Magnum: 6.28"–7.46" / 15.95 cm–18.95 cm

Intensity & Experience Level

Level: Beginner to Intermediate — Sensation: Restrictive / pressure

The Deuce is approachable for first-time harness wearers thanks to its forgiving stretch and straightforward velcro adjustments, though a solo test-fit session is strongly recommended before partnered play. The added leg strap pressure across the perineum and the cock-ring-like lower opening do introduce a mild restrictive sensation that users should assess for comfort before extended sessions.

Who is this product for?

• Penis-owners with ED or premature ejaculation: Enables continued penetrative intimacy regardless of erection status, reducing performance pressure and maintaining connection.
• Anyone exploring double penetration: The dual openings allow simultaneous use of a dildo and the wearer's own penis for fulfilling DP experiences.
• Transmasc folks: Provides euphoria and affirming control by supporting both penetrative play with a dildo and engagement of the wearer's own anatomy.
• People with limited hand or arm mobility: The stable harness structure holds toys firmly in position, reducing the need for continuous manual control during penetration.
• Adventurous couples on date night: Can be worn discreetly under clothing for playful surprise, or used openly to add a new dimension to partnered sex.

How to use the Deuce Harness?

1. Size up first: Measure your waist and thigh circumference before ordering and select from Size A Regular, Size B Regular, Size A Magnum, or Size B Magnum accordingly.
2. Insert your dildo: Push your chosen dildo through the stretchy O-ring at the front of the harness and ensure it sits snugly — a firm fit prevents wobble during use.
3. Thread your penis (if applicable): Slide your penis through the lower opening for soft or erect play. If you prefer to use only the dildo, simply leave this opening empty.
4. Secure the harness: Tighten the waistband and leg straps using the velcro closures until the harness feels stable and comfortable, not constricting.
5. Comfort checkpoint: Move around, bend, and shift your weight. Both openings should feel secure but not painfully tight. Readjust straps if there is any pinching or numbness.
6. Add a vibrator (optional): Tuck a mini bullet vibe into the internal pocket within the flaps of the dildo opening to introduce vibration to the perineum or a partner's clitoris.
7. Stop or release step: To remove quickly, unfasten the velcro waistband first, then loosen the leg straps and step out. Remove the dildo from the O-ring before storage.

Techniques & ways to play

• Solo fitting and exploration: Wear the harness alone to get comfortable with the adjustments, try different dildo sizes in the O-ring, and experiment with the vibe pocket placement.
• Missionary with eye contact: The stable harness allows the wearer to focus on rhythm and connection without managing a hand-held toy — ideal for intimate, face-to-face partnered play.
• Doggy style: Body weight drives steady penetration hands-free, letting both partners focus on sensation rather than positioning.
• Rider-on-top: The harness wearer can relax and receive perineal stimulation from the leg straps while their partner controls depth and pace.
• Curved dildo pairing: A curved dildo in the O-ring allows targeted prostate or G-spot stimulation from penetration angles that a solo hand hold cannot maintain.
• Dom/sub dynamic: The Dom partner may select and insert the dildo before play begins, while the sub wears the harness — establish consent and safe words before any restraint or role assignment is layered on top.
• Dressed kink: Worn beneath clothing during an outing or roleplay scenario for discreet anticipation before an agreed scene.

Pairs well with / Complete the scene

• Mini bullet vibrator: Required to activate the internal vibe pocket — any compact rechargeable or battery-powered bullet fits the flap.
• Water-based lubricant: Essential for the penis opening during transitions between flaccid and erect states to reduce fabric friction.
• Body-safe silicone or hard-plastic dildo: Pair with a curved dildo for prostate or G-spot targeting; choose a base-diameter within the O-ring's 1.25"–2" range.
• Harness-compatible dildo collection: Explore SpareParts' range of compatible dildos designed to work with their O-ring systems.
• Strap-on and harness accessories collection: Browse complementary harness care pouches, dildo storage bags, and toy cleaners.

How to clean and care

• Cleaning: Hand wash the harness in cold water with a mild, fragrance-free soap after each use. Do not bleach or machine wash.
• Drying: Hang dry completely before storing. Do not use a tumble dryer or expose to direct heat sources, which can degrade the spandex and stretch of the O-ring.
• Water play note: After shower or tub use, allow extra drying time — moisture can become trapped between fabric layers and prolong drying.
• Lube compatibility: The harness fabric itself does not contact genitals directly. For silicone dildos, use only water-based lubricant to preserve the toy surface. Lightly lubricate the penis opening to ease transitions from flaccid to erect.
• Storage: Store flat or folded in a cool, dry drawer or dedicated pouch. Keep away from sharp or rough objects that could snag the stretchy ring or velcro.

Additional information

• ED and performance support: The Deuce enables penetrative intimacy to continue regardless of erection consistency, offering a practical, confidence-affirming tool without any medical claims.
• Motor accessibility: The stable harness structure reduces the need for continuous upper-limb effort, assisting users with limited hand or arm mobility during toy-assisted penetration.
• Versatility: Suitable for cisgender men, transmasc folks, and anyone with a penis who wants adaptable, hands-free penetrative gear.
• Durability: Nylon and spandex construction is built for repeated use and water exposure; proper cold-water hand washing maintains elasticity over time.
• Discreet wearability: Low-profile enough to wear beneath fitted clothing for roleplay scenarios or playful anticipation.

Special considerations / warnings

• Mobility requirement: Putting on and adjusting the harness requires some bending and basic hand dexterity to fasten the velcro straps and thread the openings correctly.
• Test fit before partnered use: Always trial the fit solo first to confirm comfort, correct opening selection, and strap tension before introducing during partnered play.
• Cock-ring caution: The lower penis opening functions like a soft cock ring. Do not wear so tightly that circulation is restricted. Remove immediately if numbness, discoloration, or pain occurs.
• Vibe pocket: Ensure any vibrator placed in the internal pocket is clean and fully charged or powered before use. Remove the vibe before washing the harness.
• Do not use damaged hardware: Inspect velcro closures and the O-ring before each use. Discontinue use if the O-ring shows tearing or the velcro no longer holds securely.
• Water play: Ensure any electronic vibrator is fully removed from the pocket before water play.

18+ only. For consensual adult use.