There is provided an enclosure comprising: a polymeric film； wherein said polymeric film comprises one or more copolymers of ethylene with a polar monomer； and wherein the oxygen transmission rate of said enclosure is 8,000 to 16,000 cm3/hour. Also provided is a method of handling bananas comprising: (a) harvesting green bananas； (b) then placing said green bananas into such an enclosure； (c) then storing said enclosure at 20℃ or lower for 1 week or longer； (d) then ripening said bananas or allowing said bananas to ripen.本發明係提供一種包裝，包含：聚合物薄膜；其中該聚合物薄膜包含一或多種乙烯與極性單體之共聚物；其中該包裝之體積為20公升或更大；以及其中該包裝之氧氣傳輸速率為8,000至16,000cm3/小時。本發明亦提供一種處理香蕉之方法，包含：(a)採收綠色香蕉；(b)之後將該綠色香蕉置於此包裝中；(c)之後將該包裝於20℃或更低儲存1週或更久；(d)之後催熟該香蕉，或允許該香蕉熟成。
