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Security backpack with hidden zippers | Kalsten

Regular price $52.99 $104.00 SAVE $51.01 (49% OFF) Sale price
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The hand in the pocket – and the wallet is gone.

Anyone who travels daily by train or walks through busy city centers knows the uneasy feeling in the crowd: A brief moment of inattention, and important things disappear unnoticed. This backpack secures its main compartments against the back – the zippers are located on the back, directly at the wearer's back, completely inaccessible to outsiders. Laptop, wallet, and documents stay exactly where they belong.

Advantages

  • No more grabbing possible: Since the zippers are hidden at the back, pickpockets can't reach into the main compartment unnoticed – even in the densest crowd.
  • No more packing and unpacking: The padded laptop compartment safely holds laptops up to 15 inches, so no separate carrying bag or additional protection is necessary.
  • No more worries about wet contents: The water-repellent polyester keeps rain out, so laptops, documents, and electronics remain dry even in bad weather.

Specifications

  • Material: Water-repellent polyester
  • Laptop compartment: Padded, for laptops up to 15 inches
  • Colors: Black, Blue, Black Brown
  • Carrying style: Backpack or Sling Bag
  • Special feature: Hidden zippers on the back
  • Inner pockets: Separate sections for phone, cards, pens, and small items

Application

  1. Packing: Place the laptop in the padded compartment and sort cards and phone into the inner pockets.
  2. Wearing: Wear the backpack with the hidden zippers towards the center of your body – the compartments will then be against your back and inaccessible from the outside.
  3. On the go: On the train, at markets, or in busy places, simply leave the backpack on – no need to turn around or hold on.

Pro Tip: If you wear the backpack as a sling bag, turn the main compartment towards the front of your body – this way, the contents are always in view, even in very crowded areas.

 

Free standard shipping on all orders. No minimum purchase.

  • Ships to: United States
  • Processing: 1–4 business days (Mon–Fri)
  • Transit: 5–10 business days
  • Total delivery time: 6–14 business days
  • Order cut-off: 5:00 PM PST

You will receive a tracking number by email once your order ships. Please allow up to 48 hours for tracking to update.

See our full Shipping Policy.

You have 14 days from delivery to request a return.

  • Email support@open.shop with your order number to start a return.
  • Items must be unused, complete, and in their original packaging.
  • Return label: flat $9.99 USD, deducted from your refund — nothing to pay upfront.
  • Damaged, defective or incorrect items: we cover all return and replacement costs.
  • No restocking fees.
  • Exchanges: contact us and mention "exchange" — the new item ships once your return arrives.
  • Refunds are issued within 7 business days of inspection.

See our full Return Policy.

Questions about your order or our products? We're happy to help.

Open
Hooizolder 214
Drachten Friesland 9205CD
Netherlands

Email: support@open.shop

Customer Service:
Monday to Friday, 8:00 AM – 6:00 PM PST (excluding public holidays)

We reply to all messages within 24 hours on business days. Weekend messages are answered on Monday.

For quick answers, visit our FAQ page or use our Contact Form.