4F Seamless Thermoactive Underwear Set for Boys Deep Black Size 164 cm

Engineered with 4F Seamless Technology, this boys' thermoactive underwear set delivers high elasticity and moisture-wicking performance in a deep black, close-fitting design. The long-sleeve top and long pants form a complete base layer that keeps young athletes dry and comfortable during cold-weather activities.

Overview

Crafted from 92% polyester and 8% elastane, the set offers moderate to high thermal insulation while remaining breathable and quick-drying. The ergonomic, seamless construction eliminates chafing and irritation, making it ideal for skiing, snowboarding, hiking, running, cycling, or everyday wear in autumn and winter.

What stands out

• Seamless, anti-chafing design for all-day comfort
• High elasticity with a close, ergonomic fit
• Moisture-wicking and quick-drying fabric
• Breathable and flexible for unrestricted movement
• Set includes crew-neck top and elastic-waist pants

Technical details

• Material: 92% Polyester, 8% Elastane
• Technology: 4F Seamless Technology
• Functionality: Thermoactive, moisture-wicking, quick-drying
• Fit: Ergonomic, close-fitting
• Features: Breathable, anti-chafing, flexible
• Set components: Long-sleeve top, long pants
• Neckline: Crew neck
• Waistband: Elastic
• Thermal insulation: Moderate to high
• Season: All-season base layer, particularly autumn/winter
• Intended use: Skiing, snowboarding, hiking, running, cycling, everyday cold weather
• Care: Machine wash at 30°C, do not tumble dry

Our verdict

A reliable seamless base layer for active boys, combining warmth, breathability, and freedom of movement in a sleek deep black design.