These plastic cloches act like little greenhouses, both by protecting your seedlings from frost and by warming the surrounding soil.
They have a 1" vent hole in the top to prevent overheating. The 1" lip around the outside is for anchoring them. They measure 10" × 10" × 9" high.
Should last for 10 years under normal use. Made from recycled plastic pop bottles.
Made in Canada.