Wolfbike Men Thermal Fleece Compression Base Layer Top Shirt Leggings Tights Set Thin Thermal fleece & High elastic performance feel more soft and comfortable Lycra material provides super flexibility and keeps your body dry, Breathable Best for Gym, Cycling, Skiing, Climbing, Jogging, Camping & Hiking, Athletics and outdoor activities High quality from WOLFBIKE. Material: 80% Polyester 20% Lycra Please select 1 or 2 size up from your normal size, e.g. Size tag Large = US Medium