Military 1st have shared details of the Pentagon Pindos thermal shirt they are stocking:
Pentagon Pindos Thermal Shirt
Breathable and lightweight Pentagon Pindos is isothermal underwear shirt made of durable and stretchable thermoactive material with excellent anti-bacterial properties and moisture-wicking Dry Pro technology for all-day comfort. Perfect to wear as part of the layering system or on its own.
Find out more at Military 1st:
The UK customers: http://mil1.st/K11003-03UK
The rest of the world: http://mil1.st/K11003-03US
Free UK delivery and returns! Free shipping to the U.S., Ireland, and Australia. Low delivery rates across Europe.
