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HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof | Kalsten

$91.99 $154.00 SAVE $62.01 (40% OFF)

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HydroTrail Backpack with Built-in Water Bladder – Lightweight & Waterproof

The HydroTrail Backpack combines comfort, durability, and smart functionality in a light and versatile design. Thanks to the integrated 2L water bladder with drinking tube and ample storage options, this backpack is ideal for hiking, biking, and outdoor adventures.

Benefits of the HydroTrail Backpack:

2L water reservoir: Includes built-in water bladder with convenient drinking tube – no more separate bottles needed.
Comfortable & lightweight: Only 590 g and equipped with adjustable waist, chest, and shoulder straps.
Durable & weather-resistant: Made from polyester and tear-resistant nylon with waterproof properties.

Product Specifications:

Capacity: 2L water bladder + additional storage space
Material: Polyester and tear-resistant nylon
Dimensions: 43 x 22 x 20 cm
Weight: 590 g
Extra features: Waterproof, adjustable straps, headphone connection

Whether you’re heading into nature or just like to be prepared on the go – with the HydroTrail Backpack you always have hydration and storage space at hand. Order today and experience ultimate outdoor comfort!

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.

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