I would use Mocha rather than Chocolate because that is the actual product color/model designation, and visually it fits the warm medium-brown family. The arms are heavily padded and rounded, so Pillow Arms is the best standardized arm term.
Here is the full description I would use:
Plush Comfort for Everyday Living
Sink into the inviting comfort of the Osaka sofa and loveseat. Upholstered in a soft mocha polyester plush fabric, this set offers a warm, versatile color and an exceptionally comfortable feel.
Generously padded pillow arms, supportive lumbar cushioning, and plush padded headrests create a relaxed seating experience designed for everyday comfort. The soft, textured upholstery adds warmth and dimension while giving the group an easygoing style that works well in a variety of living rooms.
Features
Color: Mocha
Covering: Polyester Plush Fabric
Arm Style: Pillow Arms
Dimensions:
Sofa – 89 x 38 x 39H
Loveseat – 65 x 38 x 39H
