Grown from the earth. 

Built for the cold chain.

Sustainable by composition.

ColdShip's hemp insulation is carbon negative, USDA Certified Biobased,
and ASTM-tested to perform.

No Styrofoam.
No compromises on temperature control.

~3.7

R-Value per inch
ASTM C518 tested

89%

USDA Biobased
Certified content
Hemp fiber's environmental profile is verified at the material level — not offset-purchased, not carbon-accounted through a registry. The cultivation itself sequesters more carbon than the full manufacturing and logistics chain produces.

90%

Natural plant fiber
No VOCs, non-allergenic

−1.21

kg CO₂e / unit
Hemp cultivation offset
Carbon Negative
USDA Biobased 89%
ASTM Tested
hemp laying down

Hemp Liner — Panel insert configuration shown open

 

 

Hemp Liners

A drop-in replacement for Styrofoam box liners, built from sustainably refined hemp fiber. The Hemp Liner fits standard corrugated cartons, ships flat to minimize storage footprint, and delivers thermal performance that meets USP <1079> transit requirements for temperature-sensitive pharmaceuticals and perishable food shipments.

Unlike expanded polystyrene, hemp is curbside compostable — which matters when your buyers are tracking EPR compliance and PBM sustainability scorecards.

Specification Value ASTM Standard
R-Value ~3.7 per inch (R3.69/in) ASTM C518
Thermal Conductivity 0.040 W/m·K ASTM C518
Density 2.81 lbs/ft³ ASTM C209
Vapor Permeability 0.647 Perms / 37 ng/Pa·s·m² ASTM E1354
Composition 90% hemp fiber, 10% polymer fiber —
Nominal Thickness 1.5" —
  • Flat-ship profile reduces inbound freight cost and warehouse cube

  • Curbside recyclable and compostable — no special disposal required by the recipient

  • VOC-free and non-allergenic — compliant with clean-room and pharmaceutical handling environments

  • USDA Certified Biobased Product at 89% — supports ESG reporting and sustainability scorecards

    Request Samples Request Spec Sheet

Hemp Mailer 1.0

The Hemp Mailer 1.0 is a fully pre-assembled insulated shipping solution — hemp panel insert sealed in barrier film , tamper-proof adhesive tape strip, and recyclable kraft paper shell built into one ready-to-fill package. No assembly required at the fulfillment station.

Designed specifically for direct-to-consumer cold chain shipments: mail-order prescriptions, specialty biologics, and temperature-controlled meal kit components where speed of packing and chain-of-custody integrity both matter.

Specification Value ASTM Standard
R-Value ~3.7 per inch (R3.69/in) ASTM C518
Thermal Conductivity 0.040 W/m·K ASTM C518
Density 2.81 lbs/ft³ ASTM C209
Vapor Permeability 0.647 Perms / 37 ng/Pa·s·m² ASTM E1354
Shell Material Recyclable kraft paper —
Closure Tamper-proof adhesive tape strip —
Assembly Pre-assembled / fulfillment-ready —
  • Pre-assembled format cuts pack station time — no liner insertion step, no additional supplies

  • Tamper-evident seal supports chain-of-custody documentation for Rx and regulated shipments

  • Kraft paper shell ships as kraft — recyclable curbside, no special instructions needed for the end customer

  • Same hemp fiber core as the Hemp Liner — identical ASTM-tested thermal performance in a mailer form factor
    Request Samples Download Spec Sheet
Pre-assembled insulated mailer
Fulfillment-ready
hemp mailer 2

Hemp Mailer 1.0 — shown open, hemp panel insert visible with barrier film

mailer 3

Hemp Mailer 1.0 — Tamper-proof adhesive tape strip visible


Hemp Fiber Technical Data

ASTM-tested specifications apply to both Hemp Liner and Hemp Mailer 1.0 products

ASTM C518

R3.69/in

Thermal Resistance
About 4× better at holding temperature than a pane of glass
ASTM C518

0.040 W/m·K

Thermal Conductivity
Heat moves through it slower than through a ceramic tile
ASTM C209

2.81 lbs/ft³

Density
As light as a loaf of bread — favorable dim weight profile
ASTM E1354

0.647 Perms

Vapor Permeability
Tighter than a coffee cup lid — moisture stays out
Life Cycle Assessment
+0.108
Packaging
+0.422
Transportation
+0.425
Manufacturing
−1.207
Hemp Cultivation
kg CO₂e per unit. Net carbon negative driven by hemp cultivation sequestration offset.

 

 

 


Sustainable by composition,
not by claim.

Hemp fiber's environmental profile is verified at the material level — not offset-purchased, not carbon-accounted through a registry. The cultivation itself sequesters more carbon than the full manufacturing and logistics chain produces. 
Composition
90% natural plant fiber, 10% polymer fiber. Non-allergenic, contains no VOCs.
Manufacturing
Low embodied energy production. Energy-efficient processing of raw hemp fiber batt.
End of Life
Recoverable, recyclable, and compostable. Accepted in standard curbside streams.
 
Chemical Profile
VOC-free. Red List Chemical free. Safe for pharmaceutical handling environments.

Every square meter of hemp naturally locks away carbon during cultivation — helping offset CO₂ across the full product life cycle. The net result: a carbon negative insulation material with no performance tradeoff.

 

 

Ready to replace Styrofoam?

Request samples or connect with our team to discuss your shipment profile, transit window requirements, and volume pricing.

 ✓  USDA Certified Biobased Product
89% biobased content