The Easy On Hive Cover is a waterproof and windproof wrap constructed with heavy tear resistant marine grade vinyl and foam board insulation. Helps keep your bees comfortable during the winter months. The cover fits tight onto hive bodies using heavy duty velcro and fits just under the hive lid as to not block the hive opening or the top vent allowing moisture to escape. No tools are needed. Simply hold the cover by the velcro ends with the seem side up. Lift over the hive and adjust for placement. Then, press the velcro strip to close. The cover can be stored flat and reused for years. R-value of 5. Compatible with 10 frame equipment only.