Frost Protection Plant Cover Small - 4 Pack Sold in packs of 4, these Small Fleece Jackets can be used to protect your plants from frost and harsh weather, ideal for small container plants on terraces or patios. This high quality 30gsm (grams per square metre) polypropylene fleece material will protect your plants while the soft material wont cause harm to buds or leaves. Letting light and moisture filter through the fleece provides a healthy growing enviroment for all plants.