Outdoor blankets vary between those that focus on weather resistance and those that focus on providing extra warmth. Some are made of wool, which is very warm, but isn’t going to hold up as well as some material to snow and rain. Other outdoor blankets are made from synthetic material to provide protection from wind and rain. Some blankets have an outer shell made of waterproof material with warmer material inside to provide both warmth and protection from the elements. Some are designed to be able to be folded into a compact carrying bag while others are large and thick and not able to be folded nearly as small.