HEAT-MAPPING VENTILATION YOU CAN SEE AND FEEL Intense training requires durable, reliable performance wear. That's why Apex is designed with strategically placed heat-mapping zones to keep you cool and dry throughout your training. But don't just take our word for it; rely on technology you can actually see. The ventilation holes on each Apex piece are visible, and each one is a specific size engineered to match where you heat up the most. Each piece in the collection works in harmony, so you can layer your Apex look and always experience premium breathability. The engineered heat-mapping of Apex means that you're free to focus on your best performance yet - no distractions, no exceptions. Because when you put in the overtime, Apex steps up every time. - Seamless construction - Heat and sweat-mapping ventilation - 67% Polyester, 21% Nylon, 12% Elastane