Use this cover to protect your Hobonichi Techo Weeks from wear and tear. Because it's clear, you can add postcards and photographs between it and the cover to customize your planner's look. The cover includes two pockets, a pen loop, and a bookmark flap. The bookmark flap comes attached to the cover. Simply press your thumb against the flap to pop it out and start using it as a bookmark. Notes: Some Hobonichi Techo Weeks planners are not compatible with this cover. Make sure to check the Recommended Refills/Parts link for a list of planners that will work with this cover. The cover may be tight when used with the Weeks Mega, but will break in over time. The cover is made of PVC vinyl, which can become stiff when left in cold temperatures. The pen holder can fit pens up to 13.5 mm (0.53”) in diameter.