【Durable Material】 This envelope is made of kraft paper, providing solid durability. It prevents damage during mailing, safely protecting important documents and items. 【Bubble Wrap Lining】 The inside is lined with bubble wrap, protecting the contents from impact. It's especially ideal for shipping fragile items. 【Simple Design】 The brown, simple design is suitable for both business and personal use. It's an easy-to-use item for any occasion. - Color: Brown - Material: Kraft Paper - Features: Bubble wrap lining Outer Dimensions: 312mm x 228mm Inner Dimensions: 292mm x 228mm Thank you for viewing.