After three years of research and trial, Michael introduced the Original Waterproof Fleece (OWF). 100% waterproof and silent fabric, OWF
is also durable and comfortable in the field. What a success. As a matter of fact OWF was so successful and performed so well that it won the Field and Steam Magazine Best of Best award in 2005 and again in 2006. However, the OWF characteristics which have it such a success and popular are also less that perfect for others. The OWF features that make it a very warm, rugged, waterproof fabric that is just the best for cold and wet days also limit the breathability of the garment. Hunters that go afield in warm weather such as early season and southern locals, sometimes find the OWF just a little too heavy.
Rivers West responded with the Advanced Waterproof Fleece
(AWF). While OWF is still by far the best choice for a the coldest and wettest conditions, AWF is more suitable for warmer days and climates because AWF is a a 2-layer fleece fabric that is waterproof and breathable.