FirmaKnit™ Run uppers are made with yarn that uses LanzaTech carbon-capture technology
LanzaTech is a biochemistry company that's developed technology to capture carbon emissions from industrial sites, such as steel mills, before they enter the atmosphere
These carbon-rich gasses are then converted into ethanol, which can be used to manufacture new materials like polyester
Socklike knit gives your feet seam-free comfort and moisture management on the trail, while integrated tongues stop debris from distracting from the vistas
Every component (except the outsoles) is undyed to limit water use and dyes in production
TerraLoft™+ Run super-critical foam is infused with nitrogen to create durable, lightweight midsoles with an energetic feeling underfoot
Midsoles are made with 20% recycled content and 10% BLOOM™ algae biomass
Cupped sidewalls and rocker-inspired midsole shape offer control and support on varying terrain
TrailBed™ Bloom insoles are made with 30% BLOOM algae biomass
Linings feature 75% recycled polyethylene terephthalate (PET); collar foam is 70% recycled PET; overlays have 30% recycled TPU
100% recycled content in the webbing and laces
Vibram® Megagrip Litebase outsoles feature traction lugs engineered for confidence on all terrain from dusty gravel to muddy singletrack
Micropatterns on the outsoles are designed to shed water and mud
REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits
Technical Specs
UpperFirmaKnit Run (yarn that uses LanzaTech carbon-capture technology)
VeganYes
GenderMen's
Lining75% recycled polyester
MidsoleTerraLoft+ Run super-critical foam (20% recycled; 10% bio-based material)
OutsoleVibram Megagrip Litebase rubber
Best UseTrail Running
Rock PlateNo
Weight (g)485
Product LineSwiftland
Member OffersJust for Members
Weight (Pair)1 lb. 1.1 oz.
SustainabilityContains recycled materials,From a Climate Neutral Certified brand
Footwear HeightAnkle
Footwear ClosureLace-up
Featured TechnologiesFirmaKnit,TerraLoft,Vibram Megagrip,LanzaTech