What head size is the "One Size" Minus33 Merino Wool Ridge Cuff Beanie

It means it's for "average" sized domes. The respondents claiming it will comfortably fit all head sizes are likely the same 5'10 guys claiming to be 6'1". I don't wear hats, thus cannot relate to hat size. I however wear a size 62 motorcycle helmet. This is determined by measuring perimeter of dome from just above (15mm) eyebrows. I am 61.8 cm. As delivered new, this beanie is very snug and barely covers down to mid ear. I soaked mine in cold water for 5 minutes then stretched and tugged over my head. Finally, let it air dry at room temp fitted over 1 gal paint can to 'block it', preventing shrinkage. This worked for me such that it doesn't pull down as low as i'd prefer but its no longer so tight to give me a headache.

How many % merino wool?

100% Australian Merino Wool - Lightweight - 18.5 micron - 230/m - helps regulate body temperature Imported. I brought with me two other beanies on my trip to Iceland. Out of the 3 I used this more as it kept me warm (in below zero temperature with wind chill)

Is this hat thin enough to wear under a bike helmet?

Hello, This hat can be worn under a helmet. It is approx. 3mm in thickness, yet still very warm. Let us know if you have any other questions! - Minus33 Merino Wool Clothing

Is it good choice to wear under -20 degree Celsius?

Merino Wool is very warm while also being very lightweight. I have worn mine at -4 F, which is -20 C, and been very comfortable.

100 Merino Wool Cuff Beanie Warm Winter Hat Novelty Beanie

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 45.72

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧢 Elevate your winter game with the beanie that works as hard as you do!

EFFORTLESS CARE - Machine washable and dryable for easy maintenance without losing softness or shape.
ONE SIZE FITS MOST - Stretch fit accommodates head sizes from 17 to 25 inches for universal comfort.
TRUSTED HERITAGE BRAND - Minus33, a legacy of quality since 2004, blending tradition with modern performance.
ALL DAY COMFORT WARMTH - Double-layered 18.5 micron Merino wool keeps you cozy without overheating.
VERSATILE OUTDOOR ESSENTIAL - Perfect for hiking, skiing, running, or under helmets—moisture-wicking and quick-drying.

This 100% Merino Wool Cuff Beanie by Minus33 offers lightweight, breathable warmth with double-layered 18.5 micron wool knit at 230 g/m². Designed for active professionals, it fits head circumferences from 17 to 25 inches, features UPF 50+ sun protection, and is machine washable for easy care. Ideal for all outdoor activities, it combines heritage craftsmanship with modern performance.

Specifications

ASIN	B07F9C9CT9
ASIN	B00FLRIYM8
Additional Features	Lightweight
Age Range Description	Adult
Apparel Closure Type	Pull-On
Apparel Fabric Stretch	Low Stretch
Apparel Fabric Weight Class	Lightweight
Best Sellers Rank	#36,177 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #6,846 in Men's Fashion
Brand Name	Minus33 Merino Wool
Color	Blaze Orange
Customer Reviews	4.6 4.6 out of 5 stars (9,060)
Date First Available	October 3, 2013
Department	mens
Fabric Type	Merino Wool
Fit Type	Stretch
Fit to Size Sentiment	Positive
Global Trade Identification Number	00819877020956
Hat Form Type	Beanie
Import Designation	Imported
Is Waterproof	False
Item model number	3580
Manufacturer	Minus33 Merino Wool
Manufacturer Part Number	3580BO
Material Type	Wool
Number of Items	1
Occasion Type	summer
Package Dimensions	1 x 1 x 1 inches; 1 pounds
Pattern	Solid
Pattern Style	Solid
Product Care Instructions	Machine Wash
Recommended Uses For Product	Outdoor Wear
Seasons	Winter
Sport Type	Hunting
Style Name	Classic
Style Number	3580BO
Sun Protection	5E+1 sun_protection_factor
Theme	Occupational/Professional
UPC	819877020956
Unit Count	1 Count
Water Resistance Level	Not Water Resistant

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