The Envirofleece is uniformly permeable to light and water giving the same level of frost protection from frost damage and water to each plant evenly and quickly.  The material should stretch up to 20% in any direction before tearing.With Athis Envirofleece the seams are made of u.v. stabilised polypropylene welded together.  This method of seam construction is more durable than 'sewn' or 'glued' seams.This fleece will protect plants in your winter garden and provide great protection for crops, protecting plants from frost damage throughout the winter months.