Amazon.com Product Description Whether it's an ultralight overnight or fast day out on the trail, the Gregory Z30 Technical Daypack is guaranteed to be a perfect fit. With the JetStream DTS Suspension, the weight of the pack transfers through the specially designed frame which increases load transfer as the weight of the pack increases. This superior support is combined with a cool ventilation for maximum comfort.
Gregory's JetStream DTS Suspension System.
Gregory's proprietary JetStream DTS Suspension System provides true airflow across the back in an extra-light version of the JetSteam LTS Suspension. A lightweight springsteel bar held in tension provides superior load transfer while keeping the weight low. The unique DTS harness yoke increases stiffness of the frame as the load in the pack increases for maximum comfort.
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