“The first men’s underwear was a shade that Adam in the Bible made by weaving figs and leaves.
Since then, it has been made of cloth since about 2,000 years ago, but until recently, little has changed.

It has been 60 years when the mass production of men’s underpants was started in the form of triangle underwear
In 1952, an old Japanese woman made a hole in the sack for her grandchildren,
which led to patent registration, spread all over the world through Japan’s trading company.

Since the 1980s, the age of chemical fiber opened,
“Fashionization of men’s underwear” began in earnest,
In the 1990s, the importance of design emerged
As today, panties with striped and colored patterns began to appear.

Then how about the functional change of underpants?
Although the design has changed, there has been no innovative development in terms of functionality.

Lashevan focuses on this point.

The key to men’s underpants function found by Lashevan is
to maintain the right temperature, 33.3 degrees, which is the most effective temperature for the activation of men’s sperm function.