There are several types of wintering fleece that come in different thicknesses and materials. Densities generally vary between 30 and 80 grams per square meter. The higher the density, the thicker the fleece will be, and therefore the warmer it will be. When choosing a wintering fleece for your plants, it is important to take the following factors into account:
The average temperature in your region
There are lightweight wintering fleeces for regions with milder temperatures, and thicker wintering fleeces for regions with colder temperatures. For Mediterranean regions, a fleece between 30 and 60 grams is sufficient. For regions where winter temperatures are the coldest, choose a wintering fleece of 60 to 90 grams.
Wind resistance
If you live in an area where there are strong winds (particularly the Atlantic coast), it is important to choose a wind-resistant wintering fleece. Heavyweight or woven polyethylene winter sails are generally more wind resistant than non-woven or lightweight polyethylene winter sails.
Water Resistance
It is also important to choose a water resistant winter sail, especially if you live in an area where there is frequent rain during the winter. Polyethylene winter sails are often water resistant. Again, sails made of woven material will be more resistant.
UV Resistance
Winter sails can be exposed to the sun's rays for long periods of time, so it is important to choose a UV resistant winter sail to prevent tearing and peeling.