Synthetic fiber expedition range for tough conditions – from tundra to taiga, the Tyin MTI is ideal for damp and cold regions in the far North. Trinity Construction provides greater protection and better insulation in the foot and head area Additional layer of fiber for improved insulation in the foot area Hot Head Hood – with 4 layers of fiber for maximum insulation in the head area All materials are designed for longevity and durability Ajungilak® MTI™ Endurance: very robust synthetic fiber filling shelterTX™ around the foot box and hood for optimum moisture protection Inside zip pocket