UIM1552 Features: * Expansion envelope * Tyvek material * Excellent alternative to boxes and cartons * Contains convenient, secure and no moisture required grip seal flap * Simply peel off release strip and press down for a quick and secure seal * Made of heavy duty * Ideal for mailing bulky items and materials * Superior water, chemical, moisture, burst, tear and puncture resistant protection * Weight capacity: 18 lb * Made in USA * Envelope size: 10" x 13" x 2" Color/Finish: * Color: White Dimensions: * Overall dimensions: 5.3" H x 11.5" W x 13.5" D