From Sinclair Patterns:
Fitted at the bust and hips, semi fitted at the waist tank top with a keyhole accent in the back designed for knit fabrics. Neckline has crew neck and deep scoop neck option. Offered without or with a slit that can be tied in the back. Can have a curved or banded hem. Armholes, neckline and keyhole are finished with binding. Can be made as a sports or a casual top. A very interesting piece of garment to make and wear.