Offer Available

PostSafe Extra Strong Peel & Seal Polythene Envelopes

£5.09£39.45 Inc Tax

PostSafe EXTRASTRONG poly envelopes are our most popular range and available in a variety of mailer sizes.


Great value, light and strong – PostSafe envelopes are ideal for any mail order, online or eBay business.

All our prices are inclusive of VAT

Quick Facts:

  • All envelopes have secure peel & seal closure
  • Available in clear with write on panel (P24 & P30)
  • White Opaque envelopes made from 100% polythene
  • Weatherproof, burst proof, tear and puncture resistant envelopes
  • Easy to write on surface
  • Accepts handwriting, stamps or franking
  • Saves on postage costs
  • Royal Mail approved “Pricing in Proportion sizes”
  • Clear envelopes made from 100% polythene
  • Recyclable envelopes
PostSafe polythene envelopes are manufactured to the highest quality standards in the UK. Polythene envelopes are strong, less expensive than paper envelopes and cardboard boxes, and the light weight reduces postage costs. All products are weatherproof, tear resistant, and 100% recyclable. The flexible structure wraps around contents and saves space – simple to use with peel and seal closure.

We utilise a minimum of 30% Recycled LDPE4 (Low-Density Polyethylene) film in our mailing bags.
Our products are recyclable and can be used as PCR (Post Consumer Recycled Resin) when processed in the appropriate manner.

All our products are approved by Royal Mail.

Product Code Open Edge (mm) Body (mm) Style
P22 165 240 Opaque
P24 240 320 Clear
P25 240 320 Opaque
P26 440 320 Opaque
P27 400 430 Opaque
P28 460 430 Opaque
P29 595 430 Opaque
P30 440 320 Clear
P32 335 430 Opaque
P39 600 700 Opaque
P42 850 700 Opaque

Additional information


Clear with Panel, Opaque

Envelope Size

165mm x 240mm, 240mm x 320mm, 335mm x 430mm, 400mm x 430mm, 440mm x 320mm, 460mm x 430mm, 595mm x 430mm, 600mm x 700mm, 850mm x 700mm

Quantity per Pack

10, 100, 20, 50

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