Long Johns 400 – Fly


Protect your lower body from the elements with Long Johns 400 which are constructed from Ullfrotté Original 400 g/m² circular knit material using no lengthwise seams to minimize rubbing between the body, base-layers, and outer layers. A rear gusset ensures optimal comfort and the cuffs and waist band are knitted directly into the garment to provide increased structure, strength, and support. 


70% Merino Wool
28% Polyester
  2% Elastane

Weight: 400 g/m²
Microns: 22.5

Ullfrotté Original - Spinthetics - Wool and Synthetic Blend

Machine wash 60 C / 140 FDo Not Bleach Iron on Low  Air Dry For Best Results  Dry Cleanable. Do Not Use Trichloroethylene

S, M, L, XL, 2XL, 3XL


Black, Pine, Navy

  • Ullfrotté Original Merino wool material
  • 400 g/m² weight
  • Mid layer wool long John
  • Knit-in fly
  • Circular knit wool fabric
  • No lengthwise seams
  • Elastic cuffs
  • Machine washable wool
  • Dryer safe wool - Tumble dry low
  • Available in black, green, navy
  • Merino wool pants for hunting, skiing, hiking, or fishing

    400 g/m² material is Woolpower's mid-level weight fabric made from Ullfrotté Original. Designed to be either worn directly against the skin or as a mid-layer protection, 400 g/m² optimizes the performance of our terry loop design and provides superior insulation, moisture regulation, and comfort. 400 g/m² garments were developed to increase insulation between the body, base-layer, and a wind and water resistant outer layer. Due to it's tight knit construction, 400 g/m² performs optimally in lower temperature climates.