Progenitor's Fin penis sleeve – full side view on a display base, diamond scale shell and rose glans

Progenitor's Fin – Scaled and Studded Penis Sleeve

$24.99
Sale price  $24.99 Regular price 
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Progenitor's Fin penis sleeve – full side view on a display base, diamond scale shell and rose glans

Progenitor's Fin – Scaled and Studded Penis Sleeve

$24.99
Sale price  $24.99 Regular price 
  • 100% platinum-cured silicone — body-safe, non-porous
  • Ships in plain packaging with no brand marking
  • Free shipping on orders over $99

Product details

Core Definition

Progenitor's Fin is an open-ended extension sleeve shelled in raised diamond scale panels and dome studs: 18.3 cm long over a 12.3 cm inner cavity, in Shore 00-0 platinum-cured silicone at a maximum outer diameter of 5.0 cm.

How It Works

Stretch fit without a ring. The cavity is a single open tube at Shore 00-0 that stretches to the wearer rather than sizing to him. There is no scrotum loop here; the mouth flares into a split-fin flange instead, and position is held by wall grip along the full cavity, which makes fit more dependent on the wearer's own girth.

Extension geometry. A 12.3 cm cavity inside an 18.3 cm body leaves about 6.0 cm ahead of the wearer's tip, and circumference builds toward the base, reaching 15.2 cm there. The taper runs the opposite way to most sleeves, so the widest contact sits at the entrance rather than at depth.

Two-tier texture. The shell carries large raised diamond panels in a continuous lattice, with smaller dome studs at the panel intersections. The panels sweep as broad faces; the studs land as discrete points between them, so two contact scales register at once instead of one repeating pattern.

Specifications

Specification Value
Total length 18.3 cm (7.2 in)
Inner cavity depth 12.3 cm (4.8 in)
Wall thickness or girth added Pending measurement
Max outer diameter 5.0 cm (2.0 in)
Loop No scrotum loop — open mouth with a split-fin flange at the base
Material 100% platinum-cured silicone, single density
Firmness Shore 00-0 — very soft, high stretch
Sizes One size

Who It's For

The 12.3 cm cavity is the limiting dimension: wearers longer than that lose the extension. It suits couples who want texture as the main change rather than length, and wearers who accept that a loopless sleeve needs a snug cavity fit to stay put. Not for anyone wanting a realistic skin surface or a strapped-in fit.

Care & Safety

Molded from 100% platinum-cured silicone: non-porous, phthalate-free and heat-stable. Wash with warm water and mild soap, or a dedicated toy cleaner, before and after every use; boil for two to three minutes for full sanitization. Use water-based lubricant only, as silicone lubricant attacks the surface. Dry completely, then store flat and away from other silicone items. Stop use if you feel pain, use a barrier when sharing, and keep away from anyone under 18.

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