Cold therapy — men's health — longevity
You spend 20 minutes
in a 200° sauna.
Your boys don't have to.
CryoSack is the first targeted cold therapy pack designed for sauna use. Protect scrotal temperature. Maintain testosterone. Optimize fertility.
Your body evolved to keep this anatomy outside your core for a reason.
The testicles require a temperature 2–4°F below core body temp to function properly. Scrotal thermoregulation directly affects sperm production, motility, and testosterone output.
Leydig cells, responsible for testosterone synthesis, are acutely temperature-sensitive. Chronic heat exposure from sauna sessions disrupts this system.
"Even short-term scrotal hyperthermia has measurable effects on spermatogenesis that can persist for weeks."
Built for the serious sauna user.
Every detail is designed around one specific use case: protecting scrotal temperature during intense heat exposure, without interrupting your session.
Precisely engineered to maintain scrotal temperature in the 93–95°F range during sauna sessions up to 45 minutes.
Medical-grade neoprene and food-safe gel. No degradation under high heat. Holds cold longer than standard ice packs.
Ergonomic form factor designed specifically for seated sauna use. Stays in place. No adjustment needed mid-session.
Consistent use may support Leydig cell function and reduce temperature-related disruption to T production.
Designed for men actively optimizing fertility. Maintain sperm motility and count even with a regular sauna practice.
Refreeze in under 2 hours. Fits in any gym bag. Discreet matte packaging. Built for the man who doesn't skip sauna day.
CryoSack Original
Real men. Real results.
"I do daily sauna sessions. Started using CryoSack three months ago. Had fertility panels done and my numbers improved significantly. The science checks out."
"Sounds absurd until you read the research. Then it sounds obvious. No way I'm skipping sauna but also no way I'm ignoring this. CryoSack solves a real problem."
"My wife found this and sent it to me. We've been trying to optimize everything. This is the thing nobody talks about. Game changer. Quality product too."