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Apex Over-bag. Layer over any down quilt or mummy bag to boost temperature and manage moisture.  

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The Graupel zipper-less synthetic insulated bag is a cold season companion to any down quilt or mummy bag needing a temperature boost of approximately 10-15 degrees.

The simplicity of the full bag design eliminates drafts and complex strap systems often encumbering quilt-on-quilt applications. In extreme cold a quick setup of one's sleep system can be crucial; the over-bag concept facilitates this. 

Having a quick drying synthetic insulated layer towards the outside will aide significantly in moving moisture away from the down filled inner bag/quilt (not included!). 

The 2.5 oz/yd Climashield Apex (50°F stand alone rating) is enveloped by two layers of 10d nylon, and topped with a dual adjust cord closure. Foot end is the classic sealed mummy style. 

Our many sizing options can be configured to ensure an adequate fit with minimum down loft compression.

Typical total weight from 13 oz and up.   

Size 76L x Regular Plus width x 46" foot. 400g. This size fits quilts and bags up to size long/wide. Shown here with a 28°F Sastrugi inside, with an expected temp boost down to mid teens Fahrenheit

Generous sized top opening makes it easy to set up

Anatomical foot end works for back-stomach and side sleepers alike, 

without compressing the down loft of the inner bag/quilt

The Graupel from the picture above in a stuff sack 

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Apex Over-bag. Layer over any down quilt or mummy bag to boost temperature and manage moisture.  

Product Options
Overall Width
Regular - For moderate width quilts
Regular Plus - For wide quilts or mid range mummy bags
Wide - For winter mummy bags
Narrow - For the smallest quilts
Inside Length
64" For extra short quilts/bags
68" For short quilts/bags
72" For medium quilts/bags
76" For long quilts/bags
80" For extra long quilts/bags
Climashield APEX Level
2.5 oz/yd equivalent to 50°F / 10°C
Your Measurements
Shoe Size 
What are you layering over? Type, temp, brand 

15d DWR outer - 20d grey silnylon waterproof inner


Black 15d DWR Ripstop
Stuff Sack
Yes, please include a stuff sack
No stuff sack