Alfabatik Zippered Mummy

New product

Quota full. Please check back late March

Polartec Alpha Direct mummy shaped overbag. Layer on top of any down quilt for cold weather draft control

More details


Add to wishlist

Pay via Credit Card or Paypal Account
Pay via Credit Card or Paypal Account

Quota full. Please check back late March

The Alfabatik Zippered Mummy synthetic insulated bag is designed specifically as a draft stopping cold season companion for quilts and hood-less mummy bags. Too snug for big winter mummy bags - see instead the OG Alfabatik

The mummy shaped design with a close fitting hood just large enough to fit some UL pillow types minimizes drafts from the neck and bottom opening of quilts

It also provides a temperature boost of approximately 5-8 degrees while keeping most dew and mist from penetrating the to the inner quilt

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 approximate 3 oz/yd Polartec Alpha is an ultralight fleece style knit with an open, mesh-like appearance and covered with 40 CFM ripstop nylon on top and a near zero CFM bottom material

Advantage of the Alfabatik Mummy overbag over a typical single layer DWR 'bivy': Alpha Direct insulation control moisture and condensation from touching skin and quilt surfaces. Breathing inside the bag is less of a clammy affair. Shaped and tailored fit limits cold air traps and effectively controls typical quilt drafts from movement and wind. Sleeping pad do not go inside

General advantages to using Alpha over the more traditional Climashield Apex insulator:

- Very low bulk. Foldable and compact in the pack.

- High resistance to compression damage from repeated stuffing and unstuffing. High loft Apex could be no warmer than Alpha after hard use.

- Can be slept on with limited risk of loft damage.

- Good long term durability compared to Apex.

- With the Alpha exposed to the inside of the bag it is simple to monitor moisture content and long term degradation.

- Like any woven or knitted material the appearance is consistent and even, unlike Apex which varies from wafer thin to full thickness from yard to yard.

- The low bulk makes the Alfabatik an unobtrusive day hike companion for the unexpected, especially if lined with a space blanket type product.


- Not as warm for the weight as Apex; ie where is the dew point really?

- Expensive

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

Typical total weight from 12 oz and up.   

Write a review

Alfabatik Zippered Mummy

Alfabatik Zippered Mummy

Quota full. Please check back late March

Polartec Alpha Direct mummy shaped overbag. Layer on top of any down quilt for cold weather draft control

Product Options
Overall Width
Regular - For moderate width quilts
Regular Plus - For wide quilts or mid range 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
Shell Material
7d DWR breathable topside, blue - 7d weatherproof underside, olive or grey

Polartec Alpha Direct 4004 - Dark Blue
Your Measurements
Shoe Size 
What are you layering over? Type, temp, brand 
Stuff Sack
Yes, please include a stuff sack
No stuff sack