Osprey reservoir insulator (also called a hydration bladder sleeve or reservoir insulation sleeve) is a specially designed cover that wraps around your Osprey water reservoir to help regulate the temperature of the water inside. Crafted from durable, lightweight neoprene material, this water bladder insulator adds an extra layer of thermal protection inside your hydration backpack. It’s easy to slip on and secure, and is compatible with popular Osprey® reservoirs. Built to maintain your water bladder system’s performance across a wide range of weather conditions, it helps keep drinking water cool in hot climates and helps prevents it from freezing in cold environments.

Features

Insulates your water – It uses thermal materials to help keep your water cool (or warm) for longer.
Protects the reservoir – It adds a layer of protection from heat, cold, and rough use.
Fits many hydration packs – It’s shaped to fit inside packs designed to carry reservoirs.
Includes velcro opening – Making it easy to slide your reservoir in or out without hassle.

Size Chart

Installation

FAQs

How heavy are the bladder insulators?
The Bladder Insulators weigh 3 Ounces to 5 Ounces depending on the size.

Do the bladder insulators fit tightly around the bladder?
Yes. Typically you loose a little height and width and gain in depth when the bladder is filled. Customer feedbacks have suggested a "snug fit" for better insulation and to help keep pressure against the bladder as water is depleted.

My water bladder - reservoir isn't shown in the Size Chart.
If your brand or size isn't seen, please email us or visit our Custom Sewn Bladder Insulator Page.

Can I request modifications to the bladder Insulator?
Yes. Please email us before or immediately after ordering with your requests. Include your order number.