is this comfortable to sleep with?

I did not find it comfortable to sleep in. It depends on your pillow style and your sleeping style.

What is the smallest circumference (around the throat) that the Futuro Adjustable Cervical Collar can be adjusted to?

The smallest "internal" circumference that this collar can be adjusted to is ~14 -14 1/2". Any smaller and you won't have enough Velcro showing to secure the collar in place.As I indicated in my Review awhile back, I found this to be a good "fitting collar" to determine which fixed size collar is best for an individual. That said, the adjustable part of the collar is in the front-- a 3" wide portion only, in the chin area. The rest of the collar is NOT adjustable. The adjustable chin segment is 3 1/4" tall without tightening the Velcro strap. When you snug the Velcro, you can mush that segment down to about 2 1/2". At that point, the collar looks like a bowtie. The main part of the collar measures 3 3/4" in height, or call it a "nominal 4" Once you wear it a couple of times, though, it's more like 3 1/2". At the very rear of the collar, where you fasten the Velcro to wear it, the collar is 2 1/2" in height. As I also pointed out in my Review, the packaging (see one of the pix on left of Amazon screen) states that the collar goes from 2.5 - 5.0" That is incorrect, totally. The chin segment goes from 2 1/2 - 3 1/4" and the rest is fixed at 3 3/4", call it 4", but certainly not 5".

Can someone tell me the height of the center underneath the chin without the chin strap being tightened and also the height of the sides? Thanks.

Height under chin without being tightened 3-1/4 inches (tightened 2-3/4). Height in front 4-inches. Height in back 3-inches. Height on sides tapers from 4- to 3-1/2 to 3-inches in the back..

The description says this collar is breathable. Have you found it to be any cooler than others?

It is warm, but I find it slightly cooler than some other collars I tried. For me, I believe the adjustable area under the chin allows it to be slightly less restricting and therefore not as smothering. The cover is a lose weave, which may be more breathable than certain other covers. It reminds me of the soft fabric used under a surgical boot. I am not sure to what they refer when they say it is breathable, though.

ASIN	B0057D84M6
Best Sellers Rank	#93,449 in Health & Household ( See Top 100 in Health & Household ) #291 in Back, Neck & Shoulder Supports
Date First Available	March 30, 2007
Is Discontinued By Manufacturer	No
Item Weight	0.035 ounces
Item model number	70011000828
Manufacturer	3M
Product Dimensions	4.5 x 3.75 x 8.75 inches

Futuro09027EN Adjustable Soft Cervical Collar

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