The Dupont cleanroom coverall is made of isoclean, tyvek, is packaged 25 per case, comes in white and meets AATCC 127, ASTM D 257, ASTM D 3776, ASTM D 5034, ASTM D 774, IEST-RP-CC003.3 standards. Proper sizing is important when buying this SKU. The size for this product is 3XL. These types of items are designed for specific applications which feature ways of safeguarding & shielding itself and/or the user. This part is designed and manufactured such that it offers the following protection: Sterile. Has an 35 in inseam. Features a clean room class rating of ISO Class 4.