The Holy Trainer V4 Nano Black is built for submissives who crave tight, relentless control. At just 58mm in length, this compact cage keeps your cock completely contained, no room to grow, no chance to rebel. It’s a favorite among Doms and Dommes who demand strict obedience and zero excuses.

The upgraded V4 design hugs the body with a curved, ergonomic fit, eliminating rubbing and shifting for smooth, long-term wear. It stays locked, comfortable, and utterly inescapable. Whether under clothes or beneath leather, the sleek black finish adds a quiet dominance to your submission.

Designed for hygiene and built for full-time denial, the Nano Black is perfect for subs ready to take their chastity deeper.

Lock in. Give up control. And don’t even think about getting hard.