Kids' Thermal Merino Reversible Cuffed Beanie
Smartwool

Kids' Thermal Merino Reversible Cuffed Beanie

100% Merino in a double-layer cuffed beanie with bulk-free seams, so it actually fits under a helmet.

$32
Color: Lavender Sky Heather
Size:
Size guide
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Top features
100% Merino wool
Double-layer interlock knit
Reversible
Description

Cold-weather adventures call for warmth that keeps up. The Kids' Thermal Merino Reversible Cuffed Beanie wraps little heads in soft, temperature-regulating Merino wool with a double-layer build and a reversible design that gives them two looks in one. From the bus stop to the bottom of the hill, it's the cozy layer they'll reach for all season.

Perfect for
Under a helmet
Bulk-free seams.
Reversible
Two looks, one hat.
100% Merino
No blend.
Features
  • 100% Merino wool. No blend — the whole hat is wool, which is what gives it the odor resistance and the way it keeps insulating when damp.
  • Double-layer interlock knit. Two layers of interlock trap more warm air than a single-layer beanie, without the thickness of a chunky knit.
  • Reversible. Two patterns in one hat. Flip it for a different look, or to turn the damp side away from the forehead.
  • Bulk-free seams. Seams are finished flat so the hat sits under a helmet without a ridge pressing into the head — the usual reason a kid takes a beanie off.
  • Merino moisture management. Wool moves moisture as vapor, so the band does not turn clammy on the climb back up to the lift.
Size & Fit

Two sizes, S/M and L/XL, on head circumference — measure around the head just above the ears and check the Smartwool kids' chart on this page. The cuff folds up, so it can be worn shallow or pulled down over the ears. Bulk-free seams are what let it sit under a helmet without a pressure point.

Open size guide
Materials
  • 100% Merino wool.
  • Care: Machine wash cold on gentle cycle with like colors; do not bleach; tumble dry low or lay flat to dry; do not iron; do not dry clean.
About the brand

Smartwool brings the magic of merino wool to life — keeping you warm, dry, and comfortable no matter the season. From performance socks to base layers, every piece is designed for adventure. At Mountain Sports, we love Smartwool because it proves comfort and sustainability can go hand in hand, from trail to town.

Shop all Smartwool

SKU SW018019-R11 · Style SW018019
Size guide

Smartwool Size Chart - Kids' Apparel

Smartwool Sizing Chart

Measurements are in inches, unless otherwise noted. Charts reflect body measurements, not garment measurements.

Kids' Apparel & Base Layers:

Size Age Chest Waist Height Weight (lbs)
XXS 2 - 3 22.5 - 23.5 20 - 21.5 35 - 41 31 - 41
XS 4 - 5 24 - 25 22 - 22.5 42 - 48 42 - 49
S 6 - 8 25.5 - 26.5 23 - 24 48 - 54 49 - 59
M 9 - 10 27 - 28 24.5 - 25 54 - 57 59 - 75
L 11 - 12 28.5 - 30 25.5 - 26 57 - 60 75 - 89
XL 13 - 14 30.5 - 32 26.5 - 28 60 - 62 89 - 100

How to measure - Chest: measure under the arms, around the fullest part of the chest and back. Waist: measure around the natural waistline, keeping the tape a bit loose. Height: measure standing straight, without shoes, from the top of the head to the floor.

Smartwool clothing runs true to size. If your child is between sizes, age, height and weight are good guides for choosing the best fit. Smartwool products are designed to retain their fit and shape; following the care instructions on the label will help avoid shrinking or stretching.
Performance

How it ranks across conditions.

Calibrated against comparable products we stock, so you can compare like for like.

Warmth

Light
Moderate
Warm
Very warm

Double-layer 100% Merino. Warm enough for a full winter day, and it keeps insulating if it gets damp.

Bulk under a helmet

Minimal
Low
Moderate
High

Bulk-free seams and an interlock knit are the point of this hat — it is the flatter of our two kids' beanies under a helmet.

Odor resistance

Low
Moderate
High
Excellent

100% Merino resists odor build-up as well as wool gets, which matters on a hat worn every day for a season.

Fit

Snug
Standard
Relaxed
Slouch

Sits close with a fold-up cuff, so it can be worn shallow or pulled down over the ears.

Best for

Is this right for you?

Ski and snowboard days

Designed to go under a helmet — the bulk-free seams and interlock knit are what make that work rather than an afterthought.

Not for: Not a standalone hat in a real wind; a wool knit is not windproof. Pair it with the Classic Thermal Crew

Everyday winter

100% Merino, so it survives being worn all week between washes, and the cuff lets it be worn two ways.

Not for: Above about 50°F this is more hat than most kids want. Add the Kids' Thermal Merino Neck Gaiter

Cold mornings and winter play

Wool keeps working when it gets damp, which is what happens to a hat in wet snow.

Not for: For a more hard-wearing blend with recycled content, the Reversible Art Beanie is the tougher hat. Try the Kids' Reversible Art Beanie

Full spec sheet

Technical Specs

Material100% Merino wool, exclusive of decoration
ConstructionDouble-layer interlock knit, bulk-free finished seams
ReversibleYes — wearable either side out
Fabric weight250 g/m²
Garment weight60 g (2.12 oz)
SizesS/M, L/XL
Country of originMade in Vietnam
Style numberSW018019
Questions, answered

Before you buy.

Pulled from chats, emails and store visits. The things people actually ask us before they buy. Don't see yours?

Ask a question
How do I pick between S/M and L/XL?

Measure around your child's head just above the ears and check the Smartwool kids' chart on this page. If they fall between the two, the smaller size usually sits better than the larger one slipping down.

Does it fit under a ski helmet?

That is what it is designed for. The interlock knit and the bulk-free seams keep it flat, so there is no seam ridge pressing into the head under a helmet.

Which side is the 'right' side?

Both. It is reversible, with a finished face and a different pattern on each side.

Is 100% wool itchy on the forehead?

Merino is a much finer fiber than the wool most people remember, and the band sits smooth. Most kids wear it without complaint, but the forehead is the place a wool-sensitive child will notice it, so try it on first.

How do I wash it?

Machine wash cold on a gentle cycle with like colors and dry flat or tumble dry low. Do not use a hot dryer — heat felts and shrinks a wool knit.

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