The wildlife watching lens cover is a reversible cover in proofed polycotton white on one side and waterproof white pu nylon on the reverse the lens covers have a velcro strap adjustment by the camera body and velcro adjustment at the lens hood if the lens cover is a bit long it can be bunched up or adjusted with velcro the velcro need only be adjusted when first fitting the cover for size the velcro tabs join the cover under the lens the covers are designed to be a loose fit you can get