What is a badlon?
Badlon A turtleneck is a thin, form-fitting sweater with a high collar that covers the neck. In modern fashion terminology, this word is a complete synonym for a turtleneck.

The term has St. Petersburg (Leningrad) origins and is a prime example of regional dialect. The name derives from the American brand Ban-Lon. This brand produced textured polyamide yarn, which was used to mass-produce similar sweaters in the 1960s.
When imported goods arrived in the USSR, the word "banlon" quickly entered everyday speech. Over time, for ease of pronunciation, it was transformed into the more familiar "badlon."
Distinctive features
The turtleneck's main feature is the turtleneck. It's a high, tubular neckline that's often rolled up once or twice, ensuring a snug fit.

The garment is cut precisely to fit the figure and functions as a "second skin" without adding bulk. Unlike heavy winter sweaters, the turtleneck is made from thin, smooth knit or finely ribbed fabric.
Historical models were made exclusively from synthetic materials. Modern turtlenecks are made from merino wool, cashmere, cotton, and viscose. To maintain a snug fit, elastane or spandex is always added.
What to combine with
The turtleneck works as a versatile base layer. It's worn under structured jackets, oversized denim or corduroy shirts, and deep V-neck cardigans.

The fitted top harmoniously balances the voluminous bottom. The turtleneck is paired with wide-leg palazzo pants, straight-leg jeans, or A-line skirts.

In layered looks, thin knitwear is worn under slip dresses, thick sundresses, or sleeveless overalls. A high, solid-color collar makes a great backdrop for jewelry: statement pendants, long chain pendants, or large geometric earrings.