Two different mittens are presented here: a full mitten and a fingerless mitten. Buttons at the wrist allow the cuffs to be changed like bracelets. Make both types of cuffs in different colours, then alternate them to suit your mood. The fingerless version could be worn indoors in a chilly workplace or outside when you need your fingers free.
This pattern is available as a free PDF download from the STC Craft blog:
We ask that if you download the free version, you make a pair for someone in need.