When it comes to insects contaminating bin fermentations, The Concept Cover can be beneficial to wine quality. We have come out with a new perforated material that keeps insects, including fruit flies out while letting air in. This cover aids in the possible fruit fly taint to the wine. For those times when you don’t need to keep temperatures regulated the perforated cover will keep your fruit protected.The bin skin is unlike the woven and single bubble in that it does not protect against moisture and particulates. This cover fits snug over the top of a bin, it is very lightweight and folds up to fit in a small space.