ThermaCycle Flex

Insulated Packaging Solutions from Pregis

E-commerce has become a necessity for many consumers across the globe. Now more than ever, it's critical for items to arrive on doorsteps fresh and intact - especially when it comes to grocery and meal kit deliveries, specialty foods and more.


These items fall within the world of cold chain, where time and temperature control are key. Pregis' proven insulated solution is utilized by a variety of leading, online food delivery companies – including the largest meal kit and grocery companies in the world. 

Ask About ThermaCycle Flex
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Product Box Dimensions Length Bag Width Bag Height Lip/Tape
3D Insulated Box Liner 8" x 8" x 8" 7.5" 7.5" 12.75" 1.5"
10" x 10" x 10" 9.5" 9.5" 16"
11" x 8" x 6" 10.5" 7.5" 10.75"
12" x 10" x 9" 11.5" 9.5" 15"
12" x 12" x 6" 11.5" 11.5" 13.25"
12" x 12" x 12" 11.5" 11.5" 19.25"
14" x 14" x 14" 13.5" 13.5" 22.5"
Product Bag Length Bag Width Lip/Tape
2D Insulated Pouches 6.5" 6" 1.5"
11" 8"
13" 11"
15" 11"
17" 12"
17" 15"
22" 18"

ThermaCycle™ Flex - Product Details

Ideal for cold chain applications such as meal kit delivery, ThermaCycle Flex provides protection and thermal properties that stand up to a variety of environmental conditions.


  • Metalized film, combined with durable, lightweight bubble cushioning
  • Extends the freshness of perishable food items by reflecting 97% of all radiant heat that tries to penetrate the foil barrier
  • Reflective properties act as a barrier to heat - provides a high level of light, solar radiation, and UV protection
  • Maintains desired temperature to support shelf-life goals
  • Minimizes the need for costly rush delivery methods
  • Cushioning properties prevent damage or movement during shipment
  • Made from FDA compliant materials for indirect food contact
  • Store drop off recyclable


Available in a wide range of custom and standard sizes, including 3D box liners, gusseted pouches, flat-pack pouches, and several roll sizes. Pouches are available with and without self-seal closure. 

Insulated Packaging Solutions Technical Data 

Test Details


Product Details


  • Protocol:
    ISTA 7E heat thermal profile
  • Insulation:                        ThermaCycle Flex 3D insulated box liner
  • Payload:
    3 packages of 1 lb. raw chicken breast 
  • Coolant:
    2 gel packs (64 oz.)
  • Shipping Container:                    13" x 10" x 12" 44 ECT C-Flute RSC
  • Thermo Chamber:                          32 cu. ft. csz 
  • Material: 3/16" bubble laminated to metalized polyethylene film
  • R-Value: 1
  • Density: 1.3 pcf
  • Load Capacity: 40 lbs. payload
  • Operating Temperature: -35 °F to 210 °F
  • Recyclability: no. 4 recyclable content (via store drop-off) 

ThermaCycleTM Flex 24 hrs ISTA 7E Testing – Summer Profile 

ThermaCycle Flex Temperature

ThermaCycleTM Flex 48 hrs ISTA 7E Testing – Winter Profile 

Thermaflex Winter Profile

*Performance data is for illustrative purposes. Package design, coolant volume, and payload will impact both temperature requirements and results. Contact us for customized testing based on your specific application.