Thermarest Hyperion 20F/-6C Sleeping Bag

The Hyperion is designed to provide you with high-quality heat in its lightest form, without compromising on performance. The sleeping bag uses a thermally efficient construction, making it one of the lightest sleeping bags of its class, but ensuring that you are toasty warm in as ...The Hyperion is designed to provide you with high-quality heat in its lightest form, without compromising on performance. The sleeping bag uses a thermally efficient construction, making it one of the lightest sleeping bags of its class, but ensuring that you are toasty warm in as temperatures well below freezing.

One way it does this is by placing the filling in places you need it most. The sleeping bag has SynergyLink connectors with which you can tie the sleeping bag to your mattress so you are always well protected. The sleeping bag comes with a storage bag and a compression bag.