Will this fit a 6’7” 270lbs man?

My husband is a large man and it worked for him. He is 6'5" and 340 pounds. He said he had plenty of room in the sleeping bag.

Who is the seller? Also, does this unzip at the foot area for ventilation?

I'm the seller,Yes,you can unzip at the foot area for ventilation。

How do determine left or right zip? While your in it or looking at it from outside the bag?

I'm sorry that I didn't explain left or right zip clearly. Left Zip：When you lie in sleeping bag to rest, the zipper is beside your left arm; Right Zip：When you lie in sleeping bag to rest, the zipper is beside your right arm; And you can see the letter L or R at the bottom of the storage bag. L represents the Left Zip,and R represents the Right Zip.

How do I fully open this to be a mat. I got one with one zipper at the bottom but there are two zippers at the side going in opposite directions.

you can open this sleeping bag to be a mat,simply unzip the both bottom and side zip. How to open the side zipper? it is a two-way zipper, just move the two zipper heads together to the bottom of the zipper,must be the bottom and align two zipper heads,then you can unzip it.I hope my answer can help you. It is worth mentioning that side zipper can be pulled in two way directions to facilitate ventilation.

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❄️ Sleep warm, sleep large, sleep legendary.

EASY CARE PACK - Machine washable flannel lining and tight compression sack for effortless travel.
SPACIOUS XXL DESIGN - Extra-large 90" x 39" size perfect for big, tall, or side sleepers craving room.
VERSATILE DOUBLE MODE - Zip two bags together for a double sleeping bag or open flat as a comfy mat.
DURABLE WEATHERPROOF - Tear-resistant 210T polyester shell with waterproof coating for rugged outdoor use.
ULTIMATE WINTER WARMTH - Stay cozy down to 0°F with premium cotton fill and insulated draft tube.

The HiZYNICE Zero Degree Sleeping Bag is a winter-ready, extra-large sleeping solution designed for adults big and tall. Measuring 90" x 39", it features a waterproof, anti-tear polyester shell, premium cotton filling, and a mummy-style hood with draft tube to keep you warm down to 0°F. Its versatile design allows zipping two bags together or opening flat as a mat. Machine washable and easy to compress, it’s perfect for cold weather camping and hiking.

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HK$2102

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Age Range	Adult
Color	Black
Size	90" x 39" Left Zip
Height	3.5 inches
Length	90 inches
Weight	7 Pounds
Width	39 inches
Shape	Rectangular
Material Type	Flannel
Maximum Height Recommendation	79 Inches
Number of Items	1
Outer Material	Polyester
Season	Winter
Features	Anti-tearing & Waterproof
Sport	Camping and Hiking
Included Components	Big and Tall Sleeping Bag, Compressed Sack
Batteries Included?	No
Brand	HiZYNICE
fill material type	Cotton
Department	unisex-adult
Manufacturer	HiZYNICE
Item model number	2021CSB9040BL
Product Dimensions	228.6 x 99.06 x 8.89 cm; 3.18 kg
ASIN	B098279B6J

Sleeping Bag Zero Degree Sleeping Bags for Adults Big and Tall Winter Cold Weather Camping XXL Extra Large Wide,Black Left Zip,90" x 39"

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