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The Next Generation of Insulation

PrimaLoft® technology. L.L.Bean expertise. Innovations guaranteed to keep you warm on any adventure.

PrimaLoft Cross Core Technology

A true innovation in lightweight outerwear. By fusing NASA-developed aerogel technology with PrimaLoft® Gold Insulation, this insulation is warmer than ever before – without adding extra weight.

Water resistant

Synthetic insulation performs even when wet

Warmth without bulk

Aerogel is composed of 95% air and is the lightest solid material known to man

35% recycled content

Better for your adventures, better for the environment

PrimaLoft Packaway Jackets

15% warmer without adding any weight


PrimaLoft and L.L.Bean: a History of Innovation


PrimaLoft insulation is first developed for the US Army by Albany International.


L.L.Bean outfits 30 international climbers – including former L.L.Bean President, Leon Gorman – with prototype jackets for the Mount Everest Peace Climb.


L.L.Bean develops the Mountainlight Jacket, the first commercially available product with PrimaLoft insulation.


L.L.Bean PrimaLoft All-Sport Socks are the first products made from PrimaLoft yarn, an exclusive blend of merino wool and PrimaLoft fibers.


The L.L.Bean PrimaLoft Packaway Fuse Jacket is among the first products to feature new PrimaLoft Silver Insulation Active.


L.L.Bean is first to market with PrimaLoft Gold Insulation Active, in the new Mountain Pro Fleece Hoodie.


L.L.Bean introduces outerwear featuring PrimaLoft Cross Core, the warmest synthetic insulation by weight on the market.

Shop More PrimaLoft Products

men's primaloft outerwear, apparel and footwear

women's primaloft outerwear, apparel and footwear

kids' primaloft outerwear, apparel and footwear

The Best Choice for Damp, Wet and Cold Weather

Developed for the US military for use in clothing and sleeping bags, PrimaLoft is a down-like insulation that mimics the lightweight compressibility and warmth of down, but continues to insulate even when wet. It has a supple hand that drapes comfortably for activewear.

Compressible – easy to pack. Similar to the structure of down with incredible softness, PrimaLoft is highly compressible and easy to stuff. Its resilient fibers are quick to regain their loft to provide uncompromised insulation.

Soft – comfortable PrimaLoft insulation is flexible like down, making it an excellent choice for active outerwear. It allows unrestricted movement and its light weight makes it comfortable for extended wear.

Easy care – hypoallergenic and easy to maintain. Machine wash in cold water on gentle cycle and tumble dry. Remove promptly to ensure maximum loft. Be sure to read the care label of your specific garment to protect other construction fabrics.