The damper is your "gearing"

Leaves a protective wax film for extended effectiveness

On top of that

The fitting methods for the rear Haul Loop are more varied than for the front Haul Loop

EVOC - FR Trail E-Ride 20 Backpack Color:Black The damper is your "gearing"A protector backpack, specially designed to meet the needs of e mountainbiking. LITESHIELD BACK PROTECTOR offers 95% shock absorption Separate, centred, well PADDED BATTERY COMPARTMENT with ultra safe fixation system CHARGER STRAP FIXATION SYSTEM CONTROL DISPLAY COMPARTMENT (fleece lined) Separate KEY RING included Battery Compartment: ca. 90mm x 90mm x 460mm Volume 20L Weight 1500 g Measures 27 x 56 x 14 cm