One K™ Defender Jr Helmet – Youth Fit, ASTM/SEI Certified, Ventilated Design

The One K™ Defender Jr Helmet delivers top-tier safety, comfort, and style, perfectly scaled for junior equestrians. Built with the same advanced features as the adult model, this helmet features a durable polycarbonate and ABS composite outer shell paired with an injection-molded inner shell for superior impact protection.

Designed for active young riders, the Defender Jr Helmet offers dual front, side, and rear ventilation to keep kids cool and focused during lessons or schooling. The removable, moisture-wicking liner ensures all-day comfort and easy cleaning, while the adjustable padded harness with secure buckle provides a snug, personalized fit.

Certified to ASTM F1163-15 and SEI standards, the Defender Jr Helmet is ideal for schooling, lessons, and entry-level competitions.

Key Features:

Junior-specific design for a perfect fit

Durable polycarbonate/ABS composite shell

Dual front, side, and rear ventilation for airflow

Removable, moisture-wicking, washable liner

Adjustable padded harness with secure buckle

Sleek matte or gloss finishes

ASTM F1163-15 / SEI certified for safety