I changed my mind, I want this bag for COLD weather

I’m a side sleeper… I need the stretchy.

MontBell America, Inc. U.L. Super Stretch Hugger #2 Sleeping Bag: 25 Degree Down
[Backcountry.com]

Description:

The MontBell U.L. Super Stretch Hugger #2 25 Degree Down Sleeping Bag provides warmth in sub-freezing temps at an incredibly low 1lb 11oz. Though it weighs less than your 1L bottle of water, this 800-fill down sleeping bag uses stretch stitching to hug your body and eliminate dead air space. Multi-Box baffle construction ensures the Super Stretch Hugger Sleeping Bag has no cold spots, and its bottom eight-inch baffle seals to fit smaller users. This down mummy bag’s warmth to weight ratio make it ideal for three season backpacking or rock climbing trips.

Bottom Line: A three-season sleeping bag that weights less than a full water bottle? It’s called the MontBell Super Stretch Hugger #2.
MontBell U.L. Super Stretch Hugger

Technical Features:
Material: 15D Ballistic Airlight nylon
Insulation: 800-Fill down
Shape: Mummy
Draft Collar: Yes
Max User Height: [Regular] 5ft 10in (174.8cm); [Long] 6ft 4in (193.1cm)
Shoulder/knee Circumference: [Regular] 45-59 / 34-45in (113-151 / 86-115cm); [Long] 48-64 / 38-51in (122-163 / 98-130cm)
Stuff Size: [Reg] 6 x 11.9in (12.5 x 30.22cm); [Lng] 6.3 x 12.4in (16 x 31.5cm)
Stuff or Storage sack: Stuff
Degree: 25 (-4C)
Weight: [Reg] 1lb 11oz (764.8g); [Lng] 1lb 13oz (921.5g)
Recommended Use: 3-season backpacking, camping, climbing
Warranty: Lifetime