This is listed as a "squared-off mummy". Which sleeping pad matches this? The mummy seems like it wouldn't fill it entirely, and I'm worried that a rectangular pad won't fit. Thanks for any help you may be able to provide!

Tech Specs:

Material:

[Shell] 100% recycled polyester diamond ripstop; [Lining] 100% recycled polyester taffeta 

Insulation:

Climashield HL Green (100% recycled material) 

Shape:

Squared-off mummy 

Draft Collar:

Yes 

Max User Height:

[Reg] 5ft 10in (178cm); [Lng] 6ft 6in (198cm) 

Shoulder / Hip / Foot Circumference:

[Reg] 70 / 66 / 54in (178 / 167.6 / 137cm); [Lng] 73 / 69 / 55in (185.4 / 175.3 / 140cm) 

Stuff Size:

[Reg] 8 x 9in (20.3 x 22.9cm); [Lng] 9 x 9in (22.9 x 22.9cm) 

Stuff or Storage Sack:

Both 

Degree:

35F (2C) 

Weight:

[Reg] 3lb 6oz (1531g); [Lng] 3lb 8oz (1588g) 

Recommended Use:

Moderate-weather camping 

Manufacturer Warranty:

Lifetime