Born into the mountains, used wherever adventure lies.
What is the Ninja Suit?  The Ninja Suit is the most fun and functional base layer on the planet.  The Ninja Suit is the most comfortable sleeping bag liner ever invented.  The Ninja Suit is a second skin that makes managing your personal microclimate a seamless experience.  The Ninja Suit is equally comfortable under your dry-suit on a spring Grand Canyon trip, or as a last minute Halloween costume.  We strongly encourage you to choose your own adventure… and let the Ninja Suit deploy its grappling hook and scale swiftly to the top of your next pack list. 
Universal Category features:
Stretch, 350° waist zip, easy on full zip, Thumb loops at cuffs

The Ninja Suit is must-have product for any cold weather outdoor activity that every REI customer would want for their adventures.  It is available in Youth, Women’s, and Men’s. Born in the snow, but can also be merchandised with other innovative summer products year-round.


Our Ninja Suit is a trademarked design and the only one-piece-base layer on the market with a 350° waist zipper.  Available in Hooded or Hoodless featuring fabric options in 4 Way Stretch Poly, Tencel® strengthened Merino Wool, and the new tour friendly Ninja Pro with Schoeller® Nanosphere® fabric.