Macy's has just launched Ideology - a new dancewear, active wear, yoga line. I recently tried out the "Ideology Bootcut Leg Active Pants" -
They are made of super soft material and have great stretch to them without losing their original shape. Also, they feature a super convenient hidden pocket in the waistband. One note - the legs are really long (inseam of 32 inches), which may not be ideal for everyone; definitely double-check the size details prior to purchase.
Check out the full line of tops, pants, shirts, etc at macys.com/ideology. Prices range from $7.98-$58.