Under ArmourUnisex Performance Tech No Show Socks, 6 Pairs Socks (pack of 6)

When washed & dryed, do the socks shrink into a ball? or do they shrink and still lay flat?

Is this product really as good as advertised?

How do these compare to Nike?

Thin enough not to make my tennis shoes feel tight and to work under the 100 degree Florida heat and humidity??