Buy from Amazon.co.uk : http://www.amazon.co.uk/gp/product/B0055QL3T6?tag=1001consej026-21

Ultrasport Men's Thermal Underwear Set with Quick-Dry Function - Black Small

Ideally suited for layered clothing
Quick-dry feature - the easy-care material dries quickly
Provides comfort for all sports leisure outdoor activities - eg Running cycling or winter sports
Pleasantly soft and warming top with crew neck
Lightweight