No. It is sufficient to line the walls with aromatic cedar.
cedar
I'm a little confused by this question. Is the idea to preserve the teddy bear? In that case I would recommend anything with cedar in it. You wouldn't have to get an entire cedar box, but most places that sell closet accessories sell cedar shavings or cedar blocks that you can pack with your bear. This prevents insect infestations like moths.
Yes.
Well your brother may be right in that cedar would typically be installed only in a storage closet. Now on the flip side it might be a bit cheaper to build a closet with different wood, but if you want cedar, then build with cedar.
Cedar closets can provide a nice, pleasant aroma when opening. And also the woods natural properties helps keep out moths as well as absorb moisture and odors.
cedar
The Cedar show rack fits great into a standard-width closet and will greatly increase your storage space.
If your cedar chest or cedar closet has lost its scent, give it a rub with sand paper. The newly exposed surfaces will emit the familiar cedar scent you enjoy.
Cedar is a very strong element so it will be able to protect your valuable much longer. Also the chest will not be prone to unwanted odors as you can get with other kinds of closet.
Yes it can, but it's most effective on cedar.
Using cedar when constructing a closet can help with keeping out pests such as moths, roaches, and rats. They leave an intoxicating cedar aroma and are found often in older model homes.
If it is the aromatic red heart cedar, just hit it a few times with a piece of 150 grit sandpaper. This works well on a cedar chest lining or cedar closet as well. Do not seal it with any oil or stain as it will seal the wood and no smell will emit from it.