Our Polyester (Mylar) Folder Sleeves are made from crystal-clear, 4 mil archival polyester, approved by the Library of Congress for indefinite archival storage. We use Dupont inert Melinex or a suitable equivalent. Our polyester has passed the Photo Activity Test (P.A.T.) which means that items put in the sleeves with not react with polyester material. Polyester is a sturdy, crystal-clear material with a glass-like surface and archival properties that are approved by museums for indefinite storage (hundreds of years). 
We stock four categories of 'Folder' Sleeves:
• First Day Covers
Negative Strips
Movie Posters
• Digital Photo

These sleeves are sealed on one long side, which allows for easy document insertion and retrieval.  Once inserted sleeved contents remain in place due to the static-cling nature of polyester material.

Click on links above or Scroll down for sizes and pricing.


First Day Cover US #6 'Folder' Sleeve.
3-7/8 x 6-7/8". 4 mil Polyester.
Sealed on one long side.
Indefinite Storage.
Acid-free Polyester #6 Envelope Sleeve
Description:

**NEW**

First Day Cover US #6 Envelope 'FOLDER' Sleeve.
3-7/8 x 6-7/8"   4 mil Polyester 
(Mylar)
Sealed on one long side.

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.).

Base SKU: sfdcus6petf

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First Day Cover US #10 'Folder' Sleeve.
4-1/2 x 9-7/8". 4 mil Polyester.
Sealed on one long side.
Indefinite Storage.
Acid-free Polyester #10 Envelope Sleeve
Description:

**NEW**

First Day Cover US #10 Envelope 'FOLDER' Sleeve.
4-1/2 x 9-7/8"   4 mil Polyester 
(Mylar)
Sealed on one long side.

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.).

Base SKU: sfdcus10petf

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Negative Strip Protectors. 1-9/16 x 9-1/4".
Holds 4 & 6-Frame 35mm Negative Strips.
Made from 4 mil Polyester (Mylar).
Comes with 1/4" lip.
Polyester Protectors for 35 mm Negative Strips
Description:
**NEW STYLE**
Negative Strip Protectors for
6-Frame 35mm Negative Strips
1-9/16 x 9-1/4". 4 mil  Polyester (Mylar)
Open on three sides. Come with 1/4" lip on one long edge.

Our Polyester material is approved by the Library of Congress as safe for indefinite storage and has passed the Photo Activity Test (P.A.T.). Use in acid-free storage box XNEGTAN.
Holds both 4 & 6 frame strips.

Base SKU: s35mmrlip

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120 Negative Strip Protectors. 2-9/16 x 10-1/16".
Made from 4 mil Archival Polyester.
Holds both 3 & 4-frame 120 Negative Strips.
1/4" lip.
120 Negative Strip Protectors
Description:

**NEW**

120 Negative Strip Protectors for
3 or 4-Frame 120 Negative Strips

2-9/16 x 10-1/16"   4 mil Polyester (Mylar)
Open on three sides. Come with a 1/4" lip on one long edge.


Our  Polyester material is approved by the Library of Congress as safe for indefinite storage and has passed the Photo Activity Test (P.A.T.). Use in acid-free storage box XNEGTAN.


Base SKU: s120mmrlip

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Lobby Card/Print 'Folder' Sleeve.
11-1/4 x 14-1/4". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Lobby Card Sleeves
Description:

**NEW**

Lobby Card/Print 'FOLDER' Sleeve
11-1/4 x 14-1/4"   4 mil Polyester 
(Mylar)
Sealed on one long side (14-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s1114f

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16 x 20 'Folder' Sleeve.
20-1/4 x 16-1/4". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Sleeves for 16 x 20 prints.
Description:

**NEW**

16 x 20 'FOLDER' Sleeve
20-1/4  x 16-1/4"   4 mil Polyester 
(Mylar)
Sealed on one long side (20-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s2016f

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Window Card Poster 'Folder' Sleeve.
22-1/2 x 14-1/2". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Sleeves for Window Card Posters.
Description:

**NEW**

Window Card Poster 'FOLDER' Sleeve
22-1/2  x 14-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (22-1/2").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s2214f

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Rock & Personality Poster 'Folder' Sleeve.
28-1/2 x 20-1/2". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Sleeves for Rock & Personality Posters.
Description:

**NEW**

Rock & Personality Poster 'FOLDER' Sleeve
28-1/2  x 20-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (28-1/2").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s2820f

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Half Sheet Poster 'Folder' Sleeve.
28-1/2 x 22-1/2". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Sleeves for Half Sheet Posters.
Description:

**NEW**

Half Sheet Poster 'FOLDER' Sleeve
28-1/2  x 22-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (28-1/2").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s2822f

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Insert Poster 'Folder' Sleeve.
36-1/2 x 14-1/2". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Insert Poster Sleeves
Description:

**NEW**

Insert Poster 'FOLDER' Sleeve
36-1/2  x 14-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (36-1/2").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s3614f

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One Sheet Poster 'Folder' Sleeve.
40-1/4 x 27-1/2". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Sleeves One Sheet Posters.
Description:

**NEW**

One Sheet Poster 'FOLDER' Sleeve
40-1/4  x 27-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (40-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s4027f

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One Sheet Poster 'Folder' Sleeve.
41-5/16 x 27-1/2". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Sleeves One Sheet Posters.
Description:

**NEW**

One Sheet Poster 'FOLDER' Sleeve
41-5/16  x 27-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (41-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s4127f

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British Quad Poster 'Folder' Sleeve.
40-1/2 x 30-1/2". 4 mil Polyester.
Sealed on one long side.
Acid-free Polyester Sleeves British Quad Posters.
Description:

**NEW**

British Quad Poster 'FOLDER' Sleeve
40-1/2 x 30-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (40-1/2").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s4030f

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Digital Photo 'Folder' Sleeve.
11-1/4 x 8-3/4". 4 mil Polyester.
Sealed on one long side.
Description:

**NEW**

Digital Photo 'FOLDER' Sleeve
11-1/4 x 8-3/4"   4 mil Polyester 
(Mylar)
Sealed on one long side (11-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s811f

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Digital Photo 'Folder' Sleeve.
12-1/4 x 9-1/4". 4 mil Polyester.
Sealed on one long side.
Description:

**NEW**

Digital Photo 'FOLDER' Sleeve
12-1/4 x 9-1/4"   4 mil Polyester 
(Mylar)
Sealed on one long side (12-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s912f

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Digital Photo 'Folder' Sleeve.
18-1/4 x 12-1/4". 4 mil Polyester.
Sealed on one long side.
Description:

**NEW**

Digital Photo 'FOLDER' Sleeve
18-1/4 x 12-1/4"   4 mil Polyester 
(Mylar)
Sealed on one long side (18-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s1218f

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Print 'Folder' Sleeve.
18-1/4 x 14-1/4". 4 mil Polyester.
Sealed on one long side.
Description:

**NEW**

Print 'FOLDER' Sleeve
18-1/4 x 14-1/4"   4 mil Polyester 
(Mylar)
Sealed on one long side (18-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s1418f

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Digital Photo 'Folder' Sleeve.
24-1/4 x 18-1/4". 4 mil Polyester.
Sealed on one long side.
Description:

**NEW**

Digital Photo 'FOLDER' Sleeve
24-1/4 x 18-1/4"   4 mil Polyester 
(Mylar)
Sealed on one long side (24-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s1824f

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Digital Photo 'Folder' Sleeve.
24-1/4 x 20-1/4". 4 mil Polyester.
Sealed on one long side.
Description:

**NEW**

Digital Photo 'FOLDER' Sleeve
24-1/4 x 20-1/4"   4 mil Polyester 
(Mylar)
Sealed on one long edge(24-1/4").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s2024f

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Digital Photo 'Folder' Sleeve.
30-1/2 x 24-1/2". 4 mil Polyester.
Sealed on one long side.
Description:

**NEW**

Digital Photo 'FOLDER' Sleeve
30-1/2 x 24-1/2"   4 mil Polyester 
(Mylar)
Sealed on one long side (30-1/2").

Crystal-clear archival material. 
• Approved for Indefinite Storage by the Library of Congress.
• Passed the Photo Activity Test (P.A.T.)


Base SKU: s2430f

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