Which is better for winter?

The Carhartt A18. Its acrylic rib knit covers the head and ears and holds warmth. The Xiaomi cap is unlined and breathable, so it offers little insulation in cold weather.

The Carhartt A18 has a long track record as workwear and a 4.7 rating from 188 owners. The Xiaomi cap is a light casual hat with little owner feedback, so durability is less proven.

Is the Carhartt worth stepping up to over the Xiaomi?

If you need warmth and a proven workwear build, yes. If you only want a light cap for mild days, the Xiaomi covers that need.

Can I wear the Carhartt A18 in summer?

It is a winter beanie and will feel warm in heat. The Xiaomi cap is the better pick for warm weather.

The Carhartt is one size for heads of 54-63 cm with a fold-up cuff. The Xiaomi is one size with an adjustable back strap.

How should I care for each?

Hand wash the Carhartt A18 only. The Xiaomi cap is a light fabric cap and is generally easier to wash.

Carhartt A18 Beanie vs Xiaomi Baseball Cap

The Carhartt A18 is a thick rib-knit cuffed beanie built for cold weather and hard use, and its 4.7 rating from 188 owners backs that up. The Xiaomi Mi Baseball Cap is a light, breathable cotton-style cap for mild days and casual wear. They are not substitutes: one is winter insulation, the other is sun and style. Buy the Carhartt for cold, the Xiaomi for warm.

Choose the Carhartt A18 if you want a warm, durable knit beanie for winter, outdoor work or cold-weather streetwear.
Choose the Xiaomi Mi Baseball Cap if you want a light, breathable cap for mild weather, running errands or casual outfits.

Prices

Carhartt A18 Beanie: $14.50 at Walmart (last seen Nov 10)
Xiaomi Baseball Cap: $1.99 at CouponsFromChina.com (last seen Nov 10)
Difference: the Xiaomi Baseball Cap is $12.51 cheaper than the Carhartt A18 Beanie at the latest prices (Nov 10)