Under Armour Women's UA Iso-Chill Breathe Adjustable Cap Color:Black Mesh: 90% Nylon/10% Elastane

Mesh: 90% Nylon/10% Elastane

And as for tech features

easy walking outsole providing the optimum balance between flex and torsional rigidity

And the ponytail opening in the back is designed for multiple ways to wear your hair

We call it "Rival Terry

Under Armour Women's UA Iso-Chill Breathe Adjustable Cap Color:Black Mesh: 90% Nylon/10% ElastaneThis hat was designed to keep your head cool by dumping excess heat through special vents that allow hot air out, but are small enough that the sun's rays aren't an issue. Ultra light stretch woven fabric is durable & breathable Laser perforations for strategic ventilation Iso Chill sweatband helps disperse body heat, making it feel cool to the touch Large back ponytail opening with adjustable closure 1369787