Retractable Helmet Sling Outside Where it Should be. Save the storage space and ventilate your helmet. A stretchable sling easily deploys from a zippered lower pocket on the Trekker Line of ski boot bags to securely hold and carry your helmet on the pack’s exterior. More Stories Intuitive Packing System™ Packed with Pockets. Kulkea’s Trekker Line includes a system of technically designed and strategically located pockets,… Pole Grabber™ Smart & Simple. Easy use internal strap system to secure and store poles separately from… Stash Pocket Stash your snacks, goodies and essentials in a water resistant zippered pocket.