arai helmet fit HELMETS Contour-X Cheek Pads adding reinforcement where needed without increased weight or shell thickness ARAI Correct Helmet Fit Features

You can also do a thread base wrap in a diamond pattern then wrap it with a metallic thread

The inside of the helmetstarts with a concave 3D structure that is pre-shaped to match the contours of the riders head and any surfaces in contact with the head are stitch-free

This is a review of the best mountain bike backpacks for 2026

Heavy-duty and 100% waterproof material High frequency welded seams, no stitches in all vital areas Floats on water Big waterproof main compartment (you can regulate the size with the roll down top making the backpack even bigger) Bottom if the main compartment is a separate pocket accessible from the outside Internal removable pocket that can be replaced with a laptop sleeve (sold separately) Big back pocket with waterproof zipper* Smaller top pocket with waterproof zipper* Two side mesh pockets for water bottles Two side straps for securing taller items to the side of the backpack or for compressing the backpack when its not full Comfortable shoulder straps and back both padded with non water absorbing foam Hip belt Top carrying handle Backpack dimensions: 60 x 34 x 25cm / 23 x 13 x 10 (H x W x L) Keep all your gear safe from water and dust while looking good *it is normal for waterproof zippers to be harder to open and close than regular and splash proof zippers because waterproof zippers produce a much better and tighter seal that can stop water from coming inside even when dropped into the sea (its a feature, not a bug) Is the laptop sleeve part of the backpack