The NIB HydraPak ArcticFusion Insulated Tube Kit is a winter hiking essential designed for cold weather conditions. This 36-inch tube kit by Hydrapak is made of durable silicone, gel, and rubber materials in a sleek gray color. With insulated features, this reservoir tube kit is perfect for staying hydrated during winter hikes while keeping your water cold. The lightweight design at 3.5oz makes it easy to carry on any outdoor adventure. Made in China, this unisex tube kit is a must-have for cold weather sports enthusiasts.