魔眼生腔之穴-恶魔: layered construction, uneven pressure

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Weight is 537g, overall length 16.5cm and internal length 13.5cm. The dark-red exterior uses firm material rated +1 on the review's own scale, with slight initial odour and oil release. A matte surface helps grip. The skin fully surrounds the interior but varies greatly in thickness: thick at the sides, very thin across the central connection. Very soft red material and a slightly firmer pink layer sit inside. The hardness categories are not standardized.

Detail is limited and the sample has no obvious surface flaws. The two outer sections cannot move independently because the soft connection is too short, preventing the multidirectional sliding suggested by their appearance. The channel places friction folds in line with the firm surfaces. Its cavity is wide and the upper and lower soft regions are thin.

The material combination is technically distinctive, but support is uneven. Firm sides contrast sharply with very soft front and rear regions, amplifying the difference during use. Thin soft areas bulge, creating discomfort and displaced pressure. Directional texture reinforces the imbalance instead of distributing pressure evenly.

The experimental construction does not successfully coordinate the materials and channel. The original recommendation is 1 star.