The Uno bootie or thermoBootie.Uno S7 in Assos speak, is a thermal bootie that features a windproof/waterproof panel in the front of the cover which provides extra protection from the elements. The Uno range is the Assos value line and offers a good blend of performance, fit and value.
The entire bootie is a compromised of a few anatomically shaped panels of durable doubled neoprene-like nylon. The entire front of the cover then has a layer of airBlock 851 attached. This will provide wind and water proofing to a good portion of your foot. Full zippered back makes getting the bootie on and off an easy process. Holes are pre-cut and double hemmed for heel and cleat. The Uno booties are a great deal for what you get and although they may not be the top of the heap for Assos booties, they are simply better than any bootie made from any other manufacturer.
See where this garment fits into the synergistic Assos Layering System