100% Polyethylene [Product materials]: Our mini crib mattress bag is made of polyethylene, no chemical smell.Heavy-Duty 6-Mil Clear Plastic Mattress Bags For Moving.Reusable Plastic Cover For Mattress [Comprehensive protection]:good protection waterproof, from dirt, dust, insects, pets scratch, urine, debris, stains, grime, odors and other damage. mini crib mattress cover with 6 mil thickness is tear and puncture resistant and strong enough. [Handle & Zipper]:Handle design,easy to moving. Double zipper, it provides ample space to securely store your mini crib mattress while ensuring proper fit and easy handling.Protect it during moves or long-term storage. [Product size]: the size of our mattress bag is about 38× 24 × 4 inches, it fits most mini crib mattresses. [Multiple purposes]: Suitable for mini crib mattresses, and can also be used to store seasonal clothing, sofa covers, bed sheets, bedding covers, etc. during storage, transportation, or disposal. Equally suitable for dog beds, outdoor lounges, and outdoor sofa cushions.