> ## Knowledge Base Index
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> Use this file to discover available pages before exploring further.
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# What types of materials / substrates are offered? What are their differences?

All of our biofilm materials are biodegradable with either a certified home or industrial compostability rating.

The **shelf life** of our materials is comparable to other alternative flexible packaging offerings assuming they are stored in a dry, room-temperature environment. If you are uncertain, we recommend testing with your product to determine if it fits your shelf life needs.

**Compostable Materials:**

**White** - A durable option that protects against moisture, light, and oxygen, with strong puncture resistance. The solid white outer layer makes designs pop with bright, bold color.
* Thickness: 4.0 mil
* Moisture Vapor Transfer Rate (MVTR): 0.565 g/100in²/day
* Oxygen Transfer Rate (OTR): 0.019 cc/100in²/day
* Home Compostable Certified material
[Technical Data Sheet ](https://drive.google.com/file/d/1mKVJk6yW8Wi82LZ_5CfgSdtEaxsIESTK/view?usp=sharing)


**Clear** - A transparent option that offers good protection against moisture and oxygen. Perfect for showcasing your product with window designs. See [design instructions here](/hc/en-us/articles/12524735856653)
* Thickness: 3.9 mil
* Moisture Vapor Transfer Rate (MVTR): 1.3 g/100in²/day
* Oxygen Transfer Rate (OTR): 0.065 cc/100in²/day
* Home Compostable Certified material
[Technical Data Sheet](https://drive.google.com/file/d/1KdLy7lb6oqgAFTDj2R6sa8DwnKRl9Q-s/view?usp=sharing)${color}[#0000ee]( )

**Metallized** - Provides solid protection from moisture, light, and oxygen, with strong puncture resistance. The metallic finish gives packaging a sleek, high-impact look.
* Thickness: 3.4 mil
* Moisture Vapor Transfer Rate (MVTR):  0.65 g/100in²/day
* Oxygen Transfer Rate (OTR): 0.03 cc/100in²/day
* Home Compostable Certified materia${color}[#0000ee](l)
[Technical Data Sheet](https://drive.google.com/file/d/1IejEbJf9lPXlvgh4F6dRSH1etld3IbFR/view?usp=sharing)

**White (Kraft) Paper** – Our thickest, highest-barrier film. Resistant to oils, greases, and alcohols, with excellent gas barrier properties. Ideal for dry and fatty products. The bright white paper finish delivers a clean, premium look while staying fully compostable.
* Thickness: 4.5 mil
* Moisture Vapor Transfer Rate (MVTR): 0.199 g/100in²/day
* Oxygen Transfer Rate (OTR): 0.050 cc/100in²/day
* Home Compostable Certified material
[Technical Data Sheet](https://drive.google.com/file/d/13caNCLeeLb4dpI7sHNnziVLnerr9KzNJ/view?usp=sharing)${color}[#0000ee]( )

**Post-Consumer Recycled Materials:** (Great for all liquid, cream, or gel products)
**Metallized PCR** - delivers excellent moisture, light, and oxygen barrier performance with strong puncture resistance. This structure incorporates 77% post-consumer recycled (PCR) content while maintaining the high-barrier protection required for demanding liquid and semi-liquid applications. The film can be printed in white for vibrant designs or set up to create metallized special effects for premium visual impact.
* Thickness: 4.5 mil
* Moisture Vapor Transmission Rate (MVTR): 0.06 g/100 in²/day
* Oxygen Transmission Rate (OTR): 0.07 cc/100 in²/day
* 77% post-consumer recycled (PCR) content
[Technical Data Sheet](https://drive.google.com/file/d/1ExpaeO9ILi5XOV7tVpndrygv2WG59-nA/view?usp=sharing)