I really like the long narrow mask area of Katie's new Blendable Layered Template No 57 that will be coming to the store this weekend.

Supplies, by Katie Pertiet:
Blendables Layered Template No. 57
Watery Grids Brushes and Stamps No. 01
Destination Seaside No. 02 Paper Pack
At the Beach Word Art Brushes and Stamps
Tidewater Element Pack
Beachy Clusters Brushes and Stamps