Awesome, large capacity backpack by Osprey. It is a 90’s model, maybe the predecessor to the Crescent? This appears to have the same frame, capacity & harness as the Silhouette model but the helix was supposed to be a simplified version of the silhouette. It does have the internal frame. This one feel like full ballistic nylon. It is in great shape, all zippers and pulls work. 28" Length. Vintage 90s OSPREY Helix Internal Frame Backpack Medium Click images to enlarge Description Awesome, large capacity backpack by Osprey. It is a 90’s model, maybe the predecessor to the Crescent? This appears to have the same frame, capacity & harness as the Silhouette model but the helix was supposed to be a simplified version of the silhouette. It does have the internal frame. This one feel like full ballistic nylon. It is in great shape, all zippers and pulls work. 28" Length. Listing Templates!
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