• M'S NANO PUFF PANTS, Forge Grey (FGE)
  • M's Nano Puff™ Pants,
  • M's Nano Puff™ Pants,

Patagonia Men's Nano Puff™ Pants





  • Forge Grey
    $179.00 FGE
    Forge Grey (FGE)
Forge Grey (FGE)
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M's Nano Puff™ Pants,
M's Nano Puff™ Pants,

Additional Information

Packable, breathable, low-bulk insulation for layering under waders in cold conditions. So comfortable and warm (even if wet) you’ll still be wearing them long after your waders are hung up to dry.

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Stick it out until the bitter end on the Morice and you’ll still find plenty of fish. But you’ll have to break ice just to step in and wade. If you’re up for the challenge, these are your pants. Our Nano Puff™ Pants are made with low-bulk, recycled 60-g PrimaLoft® Gold Insulation Eco for a wading experience described by one of our ambassadors as “floating in toasty, puffy warmth.” Perhaps even more important, the Nano Puffs maintain warmth even when wet—a critical factor in any under-wader insulation. Thanks to the lightweight 100% polyester fabric with a DWR (durable water repellent) finish, reinforced seat, zip fly and handy pockets, they work just as well outside of waders as in. Which means, if you’re like us, you’ll keep wearing them in camp or around town long after you’ve hung your waders up to dry.
  • Shell fabric has a DWR (durable water repellent) finish
  • Elastic back for comfort and fit
  • Two front slash pockets
  • Button-front and zipper-closed fly
  • Reinforced seat with zipper security pocket
  • Shell: 1.4-oz 100% polyester with a DWR (durable water repellent) finish. Seat reinforcement: 3.4-oz 100% nylon taslan with a DWR finish. Insulation: 60-g PrimaLoft® Gold Insulation Eco 100% polyester (55% recycled). Fabrics are bluesign® approved
  • 331 g (11.7 oz)
  • Made in Vietnam.

bluesign® Approved Fabric

Patagonia has worked with bluesign technologies since 2000 to evaluate and reduce resource consumption in our materials supply chain, and to assist us with managing the chemicals, dyes and finishes used in the process. bluesign technologies, based in Switzerland, works at each step in the textile supply chain to approve chemicals, processes, materials, and products that are safe for the environment, safe for workers, and safe for the end customers.

In 2007, Patagonia became the first brand to officially join the network of bluesign® system partners.

Any fabric you see that’s bluesign® approved offers the highest level of consumer safety by employing methods and materials in their manufacture that conserve resources and minimize impacts on people and the environment.


We use PrimaLoft® insulation inside insulated garments for its warmth, compressibility, and soft comfort. While the human body uses energy to stay warm, PrimaLoft insulation uses a patented microfiber structure to help the body retain warmth and conserve energy.

The proprietary ultra-fine fibers of PrimaLoft insulation form a tight collection of air pockets that trap heat from your body and keep the cold out, providing an excellent warmth-to-weight ratio. When insulation gets wet, it loses these air pockets and consequently, its insulating properties. PrimaLoft ultra-fine fibers were developed to be water resistant so your insulation stays drier and maintains its insulating properties even when wet.


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