Aveda Men 5 Minute Natural Grey Blending 5A Medium Ash 2.8 OZ New. Shipped safely with USPS First Class Mail. Thanks for looking. Aveda Men 5-Minute Natural Grey Blending service, you can quickly and discreetly blend away gray and restore natural-looking results right at the shampoo bowl. The collection includes five pre-blended shades-ranging from light ash to dark ash-that last up to four weeks between haircuts for low-maintenance, long-lasting color.