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. BTPTTT More Stories All-Terrain Wheels Tough outboard wheel system for reliable and smooth transportation through various ground conditions. Glove Smart™ Keep Track of Your Gloves. The Boot Trekker includes two conveniently located and designated for storing… Isolated Compression No zipper interference. Low profile, always-engaged compression straps for size adjustment and additional load control.