The L1 Westmont Flannel Jacket has diamond quilted neppy flecked flannel with a DWR coating to let the water roll off the surface. 60g insulation keeps your body heat in and the secure button closure and hem draw cord lets you bundle up to to stop the cold air from creeping in.
Polyester Fill - Polyester insulation may not be as warm or light as down, but it's far easier to clean and performs better in wet conditions. If cost is a concern or you live in a wet climate, polyester insulation might be your best option.
Synthetic insulation is measured in grams, so a jacket with a 80g rating simply means that a 1 meter by 1 meter piece of that particular jacket's insulation weighs 80 grams. The higher the rating, the warmer the jacket.
Water Resistant Fabric - A DWR (Durable Water Repellent) finish allows fabric to shed moisture and prevents saturation to keep you warmer. DWR also helps repel oils and stains which can affect the fabric's breathability. Clothing with a DWR finish is a must in snowy or wet conditions.