Please bare with us as we make major changes to our website, any issues please use webchat
product review overlay image
Premium Biodegradable Compostable Kraft Heat Seal Bags with Natureflex™ Window
Premium Biodegradable Compostable Kraft Heat Seal Bags with Natureflex™ Window
Premium Biodegradable Compostable Kraft Heat Seal Bags with Natureflex™ Window
Premium Biodegradable Compostable Kraft Heat Seal Bags with Natureflex™ Window
Premium Biodegradable Compostable Kraft Heat Seal Bags with Natureflex™ Window
View more images

Product Description

Premium Kraft & NatureFlex™ Heat Seal Bags.

Elevate your bakery and food presentation with our Premium Kraft & NatureFlex™ Heat Seal Bags. Designed for artisan bakers and eco-conscious businesses, these bags combine a rustic, natural look with high-performance freshness technology.

Made right here in the UK, they feature a crystal-clear window made from wood pulp (NatureFlex™), allowing your customers to see your delicious products while you rest easy knowing the packaging is 100% home compostable.

Why Your Customers (and the Planet) Will Love Them:
  • 🍞 Superior Freshness: Nobody likes a soggy sandwich. Our breathable materials prevent condensation build-up, ensuring your baguettes stay crispy and your pastries stay flaky.

  • 🌿 100% Home Compostable: No hidden plastics. These bags are ethically sourced and certified compostable, meeting Feed a Field Packaging™ standards. Your customers can simply add them to their home compost heap!

  • ✨ Crystal Clear Display: The NatureFlex™ window offers unhindered visibility, making your granola, cookies, and confectionery look irresistible on the shelf.

  • ✨ Premium Feel & Superior Presentation Upgrade your packaging experience. Crafted from heavy-weight 90gsm Kraft paper and a crystal-clear NatureFlex™ window, these bags offer a robust, high-quality finish that frames your food perfectly. It’s a simple way to make your products look as good as they taste.

  • 🌍 Guilt-Free & Certified Sustainable Make a choice you can feel good about. Sourced from sustainably managed forests and certified to Feed a Field Packaging™ standards, these bags are ethically produced and fully compostable. It’s the smart way to ensure your business leaves a positive impact—without the environmental cost.

  • 💰 Buy More, Save More Stocking up? maximize your budget with our exclusive volume discounts. Check the table below to see how much you can save when you order in larger quantities.

Size Option

Capacity*    (Approx, see downloads)

Dimensions (mm) Dimensions (inches) Used for
Small 125g 166 x 80mm 6.5 x 3.1" Small cookies, loose tea, nuts
Standard 250g 232 x 80mm 9.1 x 3.1" Baguettes, biscotti, pretzel sticks
Medium 500g 262 x 105mm 10.3 x 4.1"  Granola, larger pastries, artisan loaves
We recommend these complimentary bags
Product Description View Window Size mm Size inches
N5 Baguette Baguettes.

50 mm

(2 inch)

L355 x W100 14 x 4 

N1

Standard

Perfect for speciality breads, pastries, and smaller tiger loaves.

115 mm

(4.5 inch)

L355 x W175 14 x 7

N2

Medium

Ideal for standard foods such as larger foods like pastries.

125 mm

(4.9 inch)

L355 x W230 14 x 9 
N3 Large Large

180 mm

(7.1 inch)

L430 x W300 mm 17 x 12
Bulk Discounts
Number of Boxes Discount
2 to 4 5%
5 to 9 7.5%
10 to 24 10%
25 to 49 12.5%
50 to 99 15%
100 or more 20%
Tech Information
Temperature Guide -20°C to +80°C (-4°F to 176°F)
Material 90gsm Premium Heavyweight Kraft Paper (Sustainable) with NatureFlex™ Cellulose Window.
Origin: Proudly part of the Made in Green Britain™ range.
Disposal: Home Compostable, Industrial Compostable, and Recyclable (add to cardboard waste).
Read More

Product Specs

EAN
5060271921929
Design
Kraft & Natureflex Premium
Size
Medium
MPN
S11
Country of Origin
United Kingdom
Catergory
Compostable Bags
Bag Size
Medium
Product Type
Window Bags
Bag Type
Kraft & Natureflex Bags
HS Code
4819400000
Dimensions
H232 x W80mm (9.1 x 3.1 inch)
Disposable Options
Compost or Recycle Me
Brand
AuWare™
Product Code
S1KNWBP-1x50
Weight
0.47kg

Delivery

Honest Low Cost Delivery

UK Royal Mail Tracked 48 & Tracked 24 & Next Working Day. 

£3.65 up to £19.99

Free delivery for order over £125 (UK Only)

Worldwide from £8.75

Customer Reviews

Premium Biodegradable Compostable Kraft Heat Seal Bags with Natureflex™ Window

Item in Stock (596 Available)

Product Code S1KNWBP-1x50

Choose from 100 to 1000 bags
Three sizes available
Heat Sealable

Made in Green Britain

All of our products

Find over 400 plant based products here

Browse our entire range here

Food packaging

Plant based Food

Buy Food Packaging

Drink Packaging

Find our plant based drink packaging here

Buy Drink Packaging

The Pure Option News

Ditch the Dead Dinosaurs

9th March 2026

Ditch the Dead Dinosaurs

 

Read more
Natureflex the Wonder Material from Trees

4th March 2026

Natureflex the Wonder Material from Trees

 

Read more
Climate Anxiety & Why You are Not Powerless

4th March 2026

Climate Anxiety & Why You are Not Powerless

 

Read more

Plant Based Brands

Awards

Certification