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  1. Southwestern Stationers

  2. 4500 N Santa Fe Avenue

  3. Oklahoma City, OK 73118-7902

  1. Call: 405.525.9411
  2. Fax: 405.556.9000
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Strength & Moisture Resistant Envelopes

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1 - 25 of 77 items Items per page Sort
Compare   Description Price Qty
  1. Business Source DuPont Tyvek Catalog Envelopes - Document - 9" Width x 12" Length - Peel & Seal - Tyvek - 100 / Box - White
  2. zoom in
  1. BSN65858
  2. Business Source DuPont Tyvek Catalog Envelopes - Document - 9" Width x 12" Length - Peel & Seal - Tyvek - 100 / Box - White
    • Made with DuPont Tyvek so they are strong and moisture-resistant
    • Peel-to-seal closure requires no moisture; release strip makes document easily accessible
  7. Add Line Note
$102.15   BX
  2. Add to Cart
  1. Quality Park Flap-Stik Open-end Envelopes - Catalog - #10 1/2 - 9" Width x 12" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
  2. zoom in
  1. QUAR1460
  2. Quality Park Flap-Stik Open-end Envelopes - Catalog - #10 1/2 - 9" Width x 12" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
    • Patented release strip makes envelopes easy to open
    • White Tyvek envelope with Flap-Stik closure
  7. Add Line Note
$99.21   BX
  2. Add to Cart
  1. Quality Park Flap-Stik Open-end Envelopes - Catalog - #13 1/2 - 10" Width x 13" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
  2. zoom in
  1. QUAR1580
  2. Quality Park Flap-Stik Open-end Envelopes - Catalog - #13 1/2 - 10" Width x 13" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
    • Patented release strip makes envelopes easy to open
    • White Tyvek envelope with Flap-Stik closure
  7. Add Line Note
$111.25   BX
  2. Add to Cart
  1. Quality Park Open-End Poly Expansion Mailers - Expansion - 13" Width x 16" Length - 2" Gusset - Self-sealing - Polyethylene - 100 / Carton - White
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  1. QUA46393
  2. Quality Park Open-End Poly Expansion Mailers - Expansion - 13" Width x 16" Length - 2" Gusset - Self-sealing - Polyethylene - 100 / Carton - White
    • Open-end design is durable and moisture-resistant
    • Ideal for bulky mailings
  7. Add Line Note
$213.11   CT
  2. Add to Cart
  1. Business Source Tyvek Expansion Envelopes - Expansion - 12" Width x 15 1/2" Length - 4" Gusset - Peel & Seal - Tyvek - 50 / Box - White
  2. zoom in
  1. BSN65806
  2. Business Source Tyvek Expansion Envelopes - Expansion - 12" Width x 15 1/2" Length - 4" Gusset - Peel & Seal - Tyvek - 50 / Box - White
    • Super-strong Tyvek is moisture-resistant and tear-resistant
    • Requires no moisture to seal
  7. Add Line Note
$280.50  BX
  2. Add to Cart
  1. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 10" Width x 13" Length - 1 1/2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton - Whit
  2. zoom in
  1. QUAR4500
  2. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 10" Width x 13" Length - 1 1/2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton - Whit
    • Ideal replacement for costly box or carton; superior protection for light, bulky items
    • Open-end style with Flap-Stik closure
  7. Add Line Note
$222.00   CT
  2. Add to Cart
  1. Quality Park Tyvek Heavyweight Expansion Envelopes - Expansion - 10" Width x 13" Length - 2" Gusset - 18 lb - Self-sealing - Tyvek - 100 / Carton - Wh
  2. zoom in
  1. QUAR4430
  2. Quality Park Tyvek Heavyweight Expansion Envelopes - Expansion - 10" Width x 13" Length - 2" Gusset - 18 lb - Self-sealing - Tyvek - 100 / Carton - Wh
    • Ideal replacement for costly box or carton
    • Heavyweight White Tyvek with convenient Flap-Stik closure
  7. Add Line Note
$259.15   CT
  2. Add to Cart
  1. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 12" Width x 16" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 25 / Box - White
  2. zoom in
  1. QUAR4292
  2. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 12" Width x 16" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 25 / Box - White
    • Ideal replacement for costly box or carton; superior protection for light bulky items
    • White open-end, expansion Tyvek envelope with Flap-Stik closure
  7. Add Line Note
$110.11   BX
  2. Add to Cart
  1. Business Source Tyvek Open-end Envelopes - Document - 10" Width x 15" Length - Peel & Seal - Tyvek - 100 / Box - White
  2. zoom in
  1. BSN65773
  2. Business Source Tyvek Open-end Envelopes - Document - 10" Width x 15" Length - Peel & Seal - Tyvek - 100 / Box - White
    • Super-strong Tyvek is moisture-resistant and tear-resistant
    • Requires no moisture to seal
  7. Add Line Note
$124.70   BX
  2. Add to Cart
  1. Quality Park Flap-Stik Open-end Envelopes - Catalog - #15 1/2 - 12" Width x 15 1/2" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
  2. zoom in
  1. QUAR1790
  2. Quality Park Flap-Stik Open-end Envelopes - Catalog - #15 1/2 - 12" Width x 15 1/2" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
    • Patented release strip makes envelopes easy to open
    • White Tyvek envelope with Flap-Stik closure
  7. Add Line Note
$145.36   BX
  2. Add to Cart
  1. Smead String Tie Closure Top-Open Poly Envelopes - Letter - 8 1/2" x 11" Sheet Size - 200 Sheet Capacity - 1 1/4" Expansion - Poly - Clear - 6.88 oz -
  2. zoom in
  1. SMD89540
  2. Smead String Tie Closure Top-Open Poly Envelopes - Letter - 8 1/2" x 11" Sheet Size - 200 Sheet Capacity - 1 1/4" Expansion - Poly - Clear - 6.88 oz -
    • Tough, acid-free, brightly colored; ideal for the home, office or classroom
    • Expands to 1-1/4" to hold up to 200 sheets
  7. Add Line Note
  9. $10 Dunkin or Panera Card w $50 Smead Buy
$7.36   PK
  2. Add to Cart
  1. Quality Park Survivor Tyvek First Class Envelopes - First Class Mail - #10 1/2 - 9" Width x 12" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - Whi
  2. zoom in
  1. QUAR1470
  2. Quality Park Survivor Tyvek First Class Envelopes - First Class Mail - #10 1/2 - 9" Width x 12" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - Whi
    • Patented release strip makes envelopes easy to open
    • White Tyvek envelope with Flap-Stick closure and first-class border
  7. Add Line Note
$103.58   BX
  2. Add to Cart
  1. Quality Park Tyvek Heavyweight Expansion Envelopes - Expansion - 12" Width x 16" Length - 4" Gusset - 18 lb - Self-sealing - Tyvek - 50 / Carton - Whi
  2. zoom in
  1. QUAR4497
  2. Quality Park Tyvek Heavyweight Expansion Envelopes - Expansion - 12" Width x 16" Length - 4" Gusset - 18 lb - Self-sealing - Tyvek - 50 / Carton - Whi
    • Ideal replacement for costly box or carton
    • Heavyweight White Tyvek with convenient, Flap-Stik closure
  7. Add Line Note
$278.48   CT
  2. Add to Cart
  1. Quality Park Survivor Tyvek First Class Envelopes - First Class Mail - #13 1/2 - 10" Width x 13" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - Wh
  2. zoom in
  1. QUAR1590
  2. Quality Park Survivor Tyvek First Class Envelopes - First Class Mail - #13 1/2 - 10" Width x 13" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - Wh
    • Patented release strip makes envelopes easy to open
    • White Tyvek envelope with Flap-Stik closure and first-class border
  7. Add Line Note
$116.50   BX
  2. Add to Cart
  1. Quality Park Tyvek Open-End 1st Class Envelopes - First Class Mail - 10" Width x 13" Length - 1 1/2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Car
  2. zoom in
  1. QUAR4510
  2. Quality Park Tyvek Open-End 1st Class Envelopes - First Class Mail - 10" Width x 13" Length - 1 1/2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Car
    • Ideal replacement for costly box or carton; superior protection for light, bulky items
    • White open-end, expanding Tyvek envelopes with Flap-Stik closure and FCB
  7. Add Line Note
$247.67   CT
  2. Add to Cart
  1. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 10" Width x 13" Length - 1/2" Gusset - 14 lb - Self-sealing - Tyvek - 25 / Box - White
  2. zoom in
  1. QUAR4202
  2. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 10" Width x 13" Length - 1/2" Gusset - 14 lb - Self-sealing - Tyvek - 25 / Box - White
    • Ideal replacement for costly box or carton; offers superior protection for mailing light bulky items
    • White open-end, expanding Tyvek envelope with Flap-Stik closure
  7. Add Line Note
$72.04   BX
  2. Add to Cart
  1. Quality Park Open-End Poly Expansion Mailers - Expansion - 11" Width x 13" Length - 2" Gusset - Self-sealing - Polyethylene - 100 / Carton - White
  2. zoom in
  1. QUA46390
  2. Quality Park Open-End Poly Expansion Mailers - Expansion - 11" Width x 13" Length - 2" Gusset - Self-sealing - Polyethylene - 100 / Carton - White
    • Open-end design is durable and moisture-resistant
    • Ideal for bulky mailings
  7. Add Line Note
$120.13   CT
  2. Add to Cart
  1. Quality Park White Leather Tyvek Plain Envelopes - Catalog - 10" Width x 13" Length - 14 lb - Self-sealing - Tyvek - 100 / Box - White
  2. zoom in
  1. Discontinued
  2. QUAR3140
  3. Quality Park White Leather Tyvek Plain Envelopes - Catalog - 10" Width x 13" Length - 14 lb - Self-sealing - Tyvek - 100 / Box - White
    • Features embossed, leatherlike texture that gets mail noticed
    • White Tyvek with Flap-Stik closure
  8. Add Line Note
$116.25   BX
  1. 0
  1. Quality Park Flap-Stik Open-end Envelopes - Catalog - 10" Width x 15" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
  2. zoom in
  1. QUAR1660
  2. Quality Park Flap-Stik Open-end Envelopes - Catalog - 10" Width x 15" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White
    • Patented release strip makes envelopes easy to open
    • White Tyvek envelope with Flap-Stik closure
  7. Add Line Note
$126.60   BX
  2. Add to Cart
  1. Quality Park Self-Seal Light Weight Expansion Envelopes - Expansion - 10" Width x 13" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton
  2. zoom in
  1. QUAR4610
  2. Quality Park Self-Seal Light Weight Expansion Envelopes - Expansion - 10" Width x 13" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton
    • Ideal replacement for costly box or carton
    • Lightweight White Tyvek with convenient, Flap-Stik closure
  7. Add Line Note
$226.75   CT
  2. Add to Cart
  1. Business Source DuPont Tyvek 1st Class Envelopes - Document - 12" Width x 15 1/2" Length - Peel & Seal - Tyvek - 100 / Box - White
  2. zoom in
  1. BSN65860
  2. Business Source DuPont Tyvek 1st Class Envelopes - Document - 12" Width x 15 1/2" Length - Peel & Seal - Tyvek - 100 / Box - White
    • Super-strong Tyvek is moisture-resistant and tear-resistant
    • Requires no moisture to seal
  7. Add Line Note
$146.25   BX
  2. Add to Cart
  1. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 12" Width x 16" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton - White
  2. zoom in
  1. QUAR4520
  2. Quality Park Tyvek Plain Expansion Envelopes - Expansion - 12" Width x 16" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton - White
    • Ideal replacement for costly box or carton; superior protection for light, bulky items
    • Open-end style with Flap-Stik closure
  7. Add Line Note
$331.67   CT
  2. Add to Cart
  1. Cirrus Envelopes Made with DuPont Tyvek, #10 1/2, Cheese Blade Flap, Redi-Strip Closure, 9 x 12, White, 100/Box
  2. zoom in
  1. QUAR2011
  2. Cirrus Envelopes Made with DuPont Tyvek, #10 1/2, Cheese Blade Flap, Redi-Strip Closure, 9 x 12, White, 100/Box
    • Slip full size sheets right through the open-end pocket without stopping to fold them.
    • Peel and press down on the Redi-Strip® closure for a quick, easy self-seal.
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$96.53  BX
  2. Add to Cart
  1. Lion Hook and Loop Closure Poly Envelopes - A4 - 8 17/64" x 11 11/16" Sheet Size - Poly - Clear - Recycled - 1 Each
  2. zoom in
  1. LIO22080-CR
  2. Lion Hook and Loop Closure Poly Envelopes - A4 - 8 17/64" x 11 11/16" Sheet Size - Poly - Clear - Recycled - 1 Each
    • Sturdy poly for repeated use and storage
    • Easy access with convenient, hook-and-loop closure
  7. Add Line Note
$2.09  EA
  2. Add to Cart
  1. Quality Park Self-Seal Light Weight Expansion Envelopes - Expansion - 10" Width x 15" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton
  2. zoom in
  1. QUAR4630
  2. Quality Park Self-Seal Light Weight Expansion Envelopes - Expansion - 10" Width x 15" Length - 2" Gusset - 14 lb - Self-sealing - Tyvek - 100 / Carton
    • Ideal replacement for costly box or carton
    • Lightweight White Tyvek with convenient, Flap-Stik closure
  7. Add Line Note
$278.08   CT
  2. Add to Cart
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