Reebok Mens Delta Half Zip Mix Long Sleeve Training/Running Top 100% Polyester This long sleeve lightweight running and fitness top is designed with a slim, athletic fit that has a slight stretch for greater freedom of movement, therefore making it ideal for high-performance exercise Thanks to it's combination of PlayWarm, PlayShield and BareMOVE technologies it delivers an optimal balance of wicking, insulation and agility Underarm gusset for freedom of movement, and stretch bindings around the hem, cuffs, and thumb holes for a snug and comfortable fit Small zipped pocket on the bottom right side of the back for storage of valuable items Reflective Reebok branding on the chest and upper back provide enhanced visibility in low light conditions