Lightest Headwear: Top 20

Lightest first, out of 232 listed (outliers excluded).

1. 1. Finetrack Dry Layer Cap — 11 g
2. 2. Purple Mountain Observatory Polartec® Alpha® Direct 90 Neckwarmer — 12 g
3. 3. Finetrack Sky Trail Headband — 15 g
4. 4. Teton Bros. Power Wool Head Band — 15 g
5. 5. OMM Core Beanie — 18 g
6. 6. Finetrack Draught Claw Headband — 19 g
7. 7. Finetrack Rail-On Shade — 20 g
8. 8. Teton Bros. Power Wool Beanie — 20 g
9. 9. The North Face Versa Flow Beanie (Unisex) — 20 g
10. 10. Finetrack Dry Layer Warm Balaclava — 22 g
11. 11. Finetrack Draught Claw Beanie — 22 g
12. 12. Arc'teryx Aerios 5 Panel Cap — 23 g
13. 13. Finetrack Sky Trail Visor — 23 g
14. 14. Yamatomichi Only Hood — 24 g
15. 15. OMM Kamleika Cap — 25 g
16. 16. RIDGE MOUNTAIN GEAR Sunshade — 25 g
17. 17. Arc'teryx Norvan Mesh 5 Panel Cap — 26 g
18. 18. Finetrack Sky Trail Breath Cap — 27 g
19. 19. Purple Mountain Observatory Polartec® Alpha® Direct 90 Beanie — 28 g
20. 20. Finetrack Rapid Rush Hood — 29 g

Weight is the only measure here, so products that differ in material and use are compared together. Lighter does not mean better.