The Marmot Nanowave 50 Semi Rectangular Sleeping Bag provides extra space in the toe box and easily packable for water or land adventures. 

• Spirafil High Loft insulation for maximum warmth and durability
• DWR-treated polyester taffeta fabric sheds moisture
• Full-length zipper extends around end of foot box
• Snagless draft tube
• "Feely" draw cords
• Two-way zipper sliders
• Blanket construction
• Two hang loops
• Zipper garage
• Compression stuff sack 
• EN Lower Limit: 49 F
• EN Comfort: 55 F 

Specs:

Main materials: 50d 100% Polyester 2.1 oz. /yd.
Bag temperature: 50°FFahrenheit
Insulation: Spirafil
Lining: 50d 100% Polyester 1.3 oz. /yds.
Pack volume: 262ci » 4.3 liters
Weight: 2lbs 2.5oz (980g)