See how 150 years of field-driven design turned blankets into thermal systems, and learn to translate fills, fabrics, and ratings into warmer sleep outdoors.
Compare sewn, zippered, and hybrid footboxes, then match fit, insulation, and pad setup to your sleep style to prevent cold spots, drafts, and clammy toes.
Master a year-round sleep system: translate temperature ratings to real nights, match pad R-value and shelter, and see which bags truly span the seasons.
Learn how shell fabrics, RET/MVTR, and fit shape moisture control in sleeping bags, with metrics and tests to prevent clamminess and sleep dry in humid camps.
