Arctic Fuel Pump osprey the outsole's flexion grooves provide

the outsole's flexion grooves provide better flexibility to help you move more freely on the court

Featuring 4 sizes of adjustability

Two spacious pockets with zippers

XRD® in the heel strike zone to dissipate heel strike shock

The Responsible Down Standard certifies down against animal welfare requirements and tracks it from the source to the final product

Arctic Fuel Pump osprey the outsole's flexion grooves provideSpecifically engineered for use in temperatures below freezing, our Arctic Fuel Pump features extra robust seals to prevent leaks in arctic conditions. It is field maintainable and works with all MSR liquid fuel stoves, except the Dragonfly stove. Use only below 0 C (32F).