GripGrabAviator Windproof Deep Winter Under Helmet Cycling Skull Cap Thick Thermal Running Fleece Bicycle Hat Headwear

Covers very well ears and also forehead and back of head. True to the size. Finally a warm cap! If you work out a lot, it might be too warm for you. I hear a bit worse with the cap due to the thick material but nothing serious - you can hear traffic. The material is thick but not too much - it fits well under a helmet. Quality material and stitching.

Pretty much perfect for the coldest of days on the bike….warm, covers the ears and dampens the sound of wind. I would give it five stars if it cost around £25 max.

Fits well under helmet, very comfortable

My head isn’t tiny; I take a POC medium helmet with a hat underneath and a small without a hat as I’m really between the 2 sizes. The small hat moves down to my eyes so I have trouble seeing and need to push it back all the time. Other than that I’m happy with it. It’s certainly not very glamorous but it keeps my head and ears cosy and warm.

Great hat for cold days. Saved me from brain freeze on multiple occasions. Fits nicely under the helmet. Highly recommended.

My speed on the elecetric scooter is sometimes around 55km/h,so i needed warm hat.Finally rly good hat.A+++++

A great piece of kit for cold weather bike rides.

This skull cap is comfy, warm and fits well. My head is just in between sizes (~57cm) so I went for Medium and it fits well enough.This hat provides great protection against the cold and wind for your head and ears and fits under the helmet.