https://www.cotswoldoutdoor.com/p/rab...

Montane Synergy Fleece:
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The Ascent 500 from Rab is a versatile, reliable mid-weight, down-filled sleeping bag made using recycled materials. Designed for regular camping and general mountain use, it's ideal for those buying their first down sleeping bag whether that be for long trekking, or one-day backpacking adventures.


Technical details
Materials:
Fabric: 30D Recycled Pertex Quantum polyamide with fluorocarbon-free DWR
Lining: 20D Recycled Nylon (38gsm)
Insulation: 650FP RDS Certified European Duck Down with Nikwax fluorocarbon-free Hydrophobic Finish
ISO: Comfort: 1°C (34°F), Limit: -5°C (24°F), Extreme: -22°C (-8°F)
Zipped cotton sack with water-resistant base for home storage
Trapezoidal box-wall construction with differential cut
3-dimensional shaped neck collar to seal in warmth
Left and right hand bags can zip together
Drawcord stuff sack included
YKK 3/4 zip with down filled baffle
YKK zipped internal stash pocket
Anti-snag internal zip guard
YKK Anti-snag zip insert
Angled foot box
Internal Shoulder Circumference: 160cm
Packed Size: 35 x 20cm
Weight: 1060g