A good overcoat should be warm, fit you, and make you look great. 1/ Fabric: If you plan to wear your overcoat for years to come, make sure you buy a coat that is made of 100% wool and that it weighs at least 4 pounds (for average-sized men). In general, heavier coats last longer because the fabric is more durable. 2. Sleeves: The coat sleeves should completely cover the suit sleeve as well as the shirt cuff, and even reach a little further down. This way, you should not get cold on your wrists when you wear gloves with it. 3. Length: Traditionally, overcoats were rather long-reaching garments, extending almost all the way to the ankles. These full-length coats are often the coat of choice for seasoned gentlemen as they can compliment a wide range of figures…to include those of us a bit rounder in the midsection. 4. Fit: When you buy an overcoat, make sure to wear a shirt and a sportscoat or suit jacket because the coat has to fit on top of it. Some men like a looser fit while younger men often prefer a trimmer fit. However, if you see X-wrinkles when buttoning your overcoat, it is definitely too tight. 5/ Style: With regards to style it is once again up to you what you choose. The single-breasted overcoat with notched lapel is a good all-a-rounder whereas the double-breasted peak lapel overcoat is a little more formal and wears warmer when it is cold because you have two layers of fabric over your chest. 6/ Construction: High-quality coats have a sewn canvas, whereas less expensive overcoats have a fused canvas. A sewn canvas is definitely more durable and built to last whereas a poorly glued interlining can come loose after a few years, ruining the garment. If money is of no concern to you, go with a fully canvassed overcoat. If not, try to buy fully canvassed suits and go with a glued overcoat. Unlike with a suit, a glued canvas overcoat is acceptable since it is cut looser and you wear it less frequently.