The shared starting points
These two models use Darn Tough’s men’s/unisex chart and a micro-crew label. The published average heel-to-cuff height is 8.5 inches for each. That gives a useful like-for-like reference, but the boot collar still needs an actual clearance check.
Where the padding differs
The 1466 is a midweight cushion construction with padding underfoot. The 1972 is lightweight and documents cushioning underfoot, at the ankle and around the Achilles. Compare the location as well as the level.
The blends differ too
The current 1466 source lists 61% merino, 36% nylon and 3% Lycra. The 1972 source lists 43% merino, 54% nylon and 3% Lycra. These percentages are label facts; they do not prove one is warmer, faster drying or more durable.
Choose the distinction you need
If you are comparing a midweight underfoot construction with a lighter knit and additional targeted zones, these are useful alternatives. Try the chosen size in the intended footwear and check the current product care and guarantee terms.
Keep women’s constructions separate
Women’s Hiker 1903 and Light Hiker 1967 have their own chart and a 7.5-inch average height in this guide. The Hiker’s women’s material blend also differs. Do not substitute those models for the men’s comparison.
Published use of the Light Hiker construction
OutdoorGearLab’s October 2022 Light Hiker Micro Crew review adds trail-use context to the construction comparison. Its 54% nylon, 43% merino and 3% Lycra blend matches the Light Hiker record, but it does not state a style code. Read the published-use observations for its method and model-match limits; they are not a head-to-head house test of today’s 1466 and 1972.