Buy from Amazon.co.uk : http://www.amazon.co.uk/gp/product/B009YX889E?tag=1001consej026-21

Sub Sports Cold Men's Thermal Compression Baselayer Shorts - Black Large

Thermal Compression Base Layer Shorts That Keep You Warm In Cold Conditions
Maintain Optimum Muscle Temperatures - Soft Internal Fibres Provide Superb Comfort And Insulation
Stay Dry - Moisture-Wicking Fabric Transports Sweat Away From The Skin And Minimises Chafing
Increase Muscular Power Endurance - Compression Fit Improves Blood Flow And Oxygen Supply To Your Leg Muscles