Compatible with bike helmet, can be worn under the helmet when cycling in winter.

ROCKBROS helmet liner perfect for riding, skiing, snowboarding and other winter outdoor activities.

Stretch Material

Adjustable elastic fabric design, one size fits for head circumference from 53 to 61cm (21-24inch).

Cover Your Ears

Ear protection design, keeping your ear warm in winter.

Windproof and Breathable Material

Built-in mesh fabric is breathable, outer layer fabric is windproof.

• 85%Nylon, 15%Spandex
• Imported
• Elastic closure
• Hand Wash Only
• Lightweight and soft of polyester mesh fabric to keep head breathable and cool when cycling
• Cycling cap extended visor is flippable, sun-proof and dust-proof
• Compatible as bike helmet liner absorb sweat and provide shade in the hot weather