 PhD Running Ultra Light Micro The ultimate fusion of maximum fit and protection with minimal weight, this micro helps you go the distance without weighing you down. • 4-Degree Fit System for all day performance fit • WOW Technology ™ in High Density Impact Zones to reduce shock and abrasion • Smartwool inside for moisture, temperature and odor control • Duroyarn reinforcement for added comfort and durability • Strategic mesh zones for maximum ventilation Content: 73% Wool, 24% Nylon, 3% Elastic |