Water & Condensation Resistant: For year’s outdoor lovers have wanted the benefits of down insulation (lightweight, warm, compressible) without the downsides of down (fails when wet). Our new LoftTek Hybrid insulation utilizes cutting edge science to stay lofted and warm even when it gets wet! You can put these booties on even with soaked feet, and you won't have to worry about collapsing the insulation. The booties will still insulate! Ultralight Weight: 650+ fill power LoftTek Hybrid insulation fills the booties, which gives you best in class weight to warm ratios being mainly synthetic insulation. The 10D nylon liner & shell is both comfortable and ultralight weight. Full Coverage Warmth: The booties length ensures that your feet and ankles are fully covered with an elastic stretch band that will prevent heat from escaping. 3 Size Options: Keep your feet warm on any trip no matter what with booties that actually fit your feet. This will ensure you have proper circulation and that your body isn't working extra hard to warm up any extra space on those cold nights. Stay warm, and get warmer faster. Not all booties are the same…While they all typically perform the basic function of covering your feet, the question to really ask is: Will it keep you warm and comfortable? When we designed the new Outdoor Vitals LoftTek Hybrid Booties, we wanted to fix or eliminate common questions and concerns with current puffy booties. For starters, down wetting out & failing because the user had wet feet was an issue. Or, if the booties got wet in the rain or during a stumble into a river, they were essentially useless. Those problems are completely solved with our new design! Rather than down insulation, we've used LoftTek Hybrid insulation that can get soaking wet and still not collapse or fail! You can have complete confidence of warm booties (and feet) all night, no matter what! Make sure you stay warm and comfortable every time with the new LoftTek Hybrid Booties design! They are absolutely necessary, useful, warm, & comfortable for camping in the cold! Keep scrolling to learn more details.