Piggy Back Compatibility September 4, 2017 Steven Abramowitz Innovations, Micro Pack, Powder Trekker, Thermal Trekker Carry them both with ease. The Micro Pack conveniently connects and Piggybacks on to KULKEA’s Trekker series bags via the helmet sling clips. (Thermal Trekker, Boot Trekker, Powder Trekker). More Stories Lip Balm Pouch Mind the Chap! Conveniently located Shoulder strap pouch for easy balm access. Transparent Inner Pockets See it, grab it & go! The Trekker Line and Speed Pack include transparent inner… Stash Pocket Stash your snacks, goodies and essentials in a water resistant zippered pocket.