200#2 Purple Poly Bubble Mailers Envelopes Bags 8.5x12 Extra Tuff for Added Protection, Water Resistant Exceptional puncture resistance, tear strength, and cushioning performance. Our poly bubble mailers are unique, lightweight padded mailers made from a durable, moisture resistant, multi-layer blend of polyethylene film. Self-Sealing (just peel-n-seal). keeps contents secure and tamper -evident and easy to use. High Quality Poly Bubble Mailers