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Add comfort to your mummy bag with this breathable, moisture-wicking COOLMAX® liner.
Save on COOLMAX Mummy Liner with a REI coupon
Checkmate is a savings app with over one million users that have saved $$$ on brands like REI.
The Checkmate extension automatically applies REI discount codes, REI coupons and more to give you discounts on products like COOLMAX Mummy Liner.
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