This design has reached the UK at last thanks to Al’s Gym.
As worn by many a pro Thai fighter in Bangkok.
Proper Old Skool.
The 3D design is one of the most popular, and a constant best seller.

These Muay Thai Boxing Shorts are designed in Bangkok and are hand made in Thailand. The shorts are made from high quality, lightweight Nylon fabric for extra durability and comfort. 
Worn by fighters in Thailand and around the world.  
Available in sizes S-XXL. 
They feature a traditional tie waistband and are easy to put on with the elastic waistband.