These clever mittens may be worn on either hand, which puts the arch/seam either on the palm and back -- or on each side of the hand. … the red mittens have the shaping along the sides of the hands. Put the same mittens on opposite hands and the seams run along the palms and backs of the hands, as on the purple pair.

-- Knit One Knit All

The purple pair are worked with one strand of Berroco Ultra Alpaca and one strand of Schoolhouse Press Unspun Icelandic held together.

The red pair are worked with one strand Quebecoise, 210 yards, 100 grams.