Foil Insulated Envelopes

Foil Insulated Envelopes

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Foil Insulated Envelopes

Foil Insulated Envelopes

Insulated Pouches with Bubble Foil

Foil-insulated envelopes are designed for reliable temperature control in transit. Built for chilled and sensitive shipments, these pouches help maintain the products temperature and integrity from dispatch to delivery throughout the UK. 

Suitable for food, pharmaceuticals, and other temperature-critical goods, they provide a practical, cost-effective solution for last-mile distribution where consistency matters.

  • Two standard sizes are available 
  • Produced in-house for tighter quality control and competitive pricing
  • Custom sizes available (Contact Us)

If your shipments are travelling longer, ThermaPack Double offers a step up in insulation performance.

Each envelope combines a reflective foil outer layer with a cushioned bubble core, delivering both thermal performance and physical protection. Used by businesses across the UK, these insulated mailers offer a dependable option for shipping goods that can’t withstand temperature fluctuations.

Size
Size Units Per Pack 1 - 4
Unit Price 		5 - 9
Unit Price 		10+
Unit Price
280x330mm 100 £0.28 £0.26 £0.21
460x560mm 100 £1.20 £1.14 £1.11

Total (excl. VAT): £0.00 Total (incl. VAT): £0.00

Pack per size
£28.00 excl. VAT £33.60 inc. VAT
£28.00 GBP
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3000 in stockFree Next day delivery

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Premium Foil Insulated Pouches for Temperature-Sensitive Shipments


When temperature consistency matters, ThermaPack Single foil insulated pouches provide a streamlined, high-performance solution for shipping sensitive goods without unnecessary bulk.

Designed for chilled, frozen, and ambient products, these insulated envelopes are widely used across food distribution, pharmaceuticals, beverages, and electronics, where thermal stability during transit is critical.

For longer transit times or higher-risk shipments, upgrade to ThermaPack Double Insulated Envelopes for enhanced thermal protection.

Why Choose ThermaPack Single Insulated Pouches?

Manufactured in Sheffield, UK, ThermaPack Single pouches are constructed using a high-quality aluminium foil outer layer combined with a protective air bubble core. This structure delivers effective thermal resistance while remaining lightweight and space-efficient.

Unlike lower-grade polymer-based alternatives, the reflective foil surface significantly reduces radiant heat transfer, helping maintain internal temperatures for longer periods during shipment.

• Reliable Thermal Control: Suitable for chilled, frozen, and ambient deliveries
• Strong and Protective: resistant to tearing or punctures
• Fast Packing Process: Secure self-seal closure for efficient fulfilment
• Reusable Options: Available with Velcro closures for repeat-use applications

Performance Without Bulk

ThermaPack Single pouches are engineered to balance insulation and practicality. They offer consistent thermal protection while avoiding the size and handling issues associated with traditional bulky packaging materials.

Common Use Cases

• Chilled and frozen food deliveries
• Temperature-sensitive pharmaceutical shipments
• Electronics requiring thermal stability
• General insulated distribution across multiple industries

Direct from the manufacturer, no middlemen, no inflated costs.

Orders over £100 + VAT qualify for free next working day delivery within the UK (cut-off: 12 pm). European delivery is available within a typical 7-day window.

Recommended Add-Ons for Enhanced Performance

For optimal temperature retention, pair ThermaPack Single pouches with suitable refrigerants:

• CoolaPack Ice Pads – a practical choice for maintaining chilled conditions
• CoolaGel Ice Pads – designed for extended cooling, ideal for frozen shipments

Combining the right pouch with the correct coolant setup is what ultimately determines real-world performance in transit.

Insulated Envelope Data Sheet

Our Premium Insulated Envelopes

ThermaPack Single insulated envelopes are designed to deliver reliable thermal protection in a lighter, more cost-efficient format — ideal for chilled, ambient, and shorter-duration shipments.

THERMAPACK SINGLE
● Efficient thermal material for insulated envelopes
● Manufactured using true aluminium foil for effective radiant heat reflection
● Provides insulation equivalent to approximately 30mm of polystyrene
● Constructed with a foil outer layer and insulated bubble core for balanced thermal performance and durability

Technical Data – ThermaPack Single

● Thickness: 3.7mm
● Outer Layers: True Aluminium Foil
● Emissivity: 0.05
● R-Value (with x2 25mm cavities): 0.790 m²K/W
● Polystyrene Equivalence: 30mm
● Water Vapour Resistance: 600 MNs/g

ThermaPack Single is engineered for businesses that need dependable temperature control without the added bulk or cost of higher-spec materials — making it a practical choice for high-volume distribution.

• Efficient Thermal Protection
Designed to maintain stable temperatures for chilled, ambient, and short-duration frozen shipments.

• ThermaPack Single Construction
Built with a reflective foil outer layer and insulated bubble core, delivering reliable thermal performance without unnecessary bulk.

• Genuine Aluminium Foil
Uses true aluminium (not metallised film), helping reflect radiant heat and improve temperature retention during transit.

• Lightweight & Practical
Provides insulation without the size and weight of heavier packaging formats, making it ideal for cost-efficient shipping.

• Moisture & Impact Resistant
Durable outer layer resists punctures and acts as a barrier against moisture and external conditions.

• Quick Self-Seal Closure
Strong adhesive strip allows for fast packing and secure sealing in high-volume operations.

• Reusable Options Available
Velcro closure upgrades available for repeat use — suitable for returns or closed-loop systems.

• Manufactured in the UK
Produced in Sheffield for consistent quality and reliable supply.

• Direct-from-Manufacturer Pricing
No middlemen — tighter cost control and consistent product quality.

• Fast Dispatch
Free next working day delivery on UK orders over £100 + VAT (before 12pm cut-off)
European shipping available within approximately 7 days

FAQ

What is ThermaPack Single best used for?

ThermaPack Single is designed for chilled, ambient, and short-duration temperature-controlled shipments. It’s ideal for food, pharmaceuticals, and other goods where moderate insulation is required without excessive packaging bulk.

How does ThermaPack Single compare to ThermaPack Double?

ThermaPack Single offers a lighter, more cost-efficient insulation solution. For longer transit times, extreme temperatures, or higher-value goods, ThermaPack Double provides a higher level of thermal protection.

How long will ThermaPack Single maintain temperature?

Performance depends on factors like external conditions, transit time, and coolant used. For best results, pair with gel ice packs and validate performance through testing based on your specific shipping setup.

Is ThermaPack Single made from real aluminium foil?

Yes. It uses genuine aluminium foil rather than metallised film, allowing it to reflect radiant heat more effectively and improve overall insulation performance.

Can ThermaPack Single be reused?

Yes. Standard versions use a self-seal adhesive, but reusable options with Velcro closures are available for applications requiring multiple uses or returns.