I opened and attached the velcro  yesterday ,  I like  this alot for my flowers , it protects them from over watering but if they need water open flaps , water .  when done air out for awhile , but close afterward to dry out and  no drowning , warm , but it has ventilation under the frame , buy it for Fall too, cool air can kill plants  . maybe you can put extra plastic for warmth , flowers and plants are expensive to allow to die!