Guaina e Prolunga Pene Nile 16.5 cm

Stretching it on took a bit of effort the first time, but the elastic material holds up well and stayed put the whole time. The extra 2,5 cm does make a difference once it's on.

The thickness boost is definitely real, it feels noticeably fuller. The elastic material stretches well but it takes a bit of fiddling to roll on smoothly, so set aside some time. Waterproof claim holds up fine for cleanup.

The material stretches well and stays put once it's on, and the extra thickness is definitely noticeable. I do wish the length gain felt closer to the advertised 2.5 cm, but overall it did what I hoped for the price.