Plush, spacious, and comfy – the Amplitude Am3 from Sea to Summit is the ultimate down sleeping bag that instead feels like your all-too-familiar bed.
Rectangular-shaped with an ultra-wide circumference, this bag provides plenty of wiggle room so you won’t feel restricted as you snooze. With a comfort rating of -8° comfort and a lower limit of -15°, it's better suited for chillier conditions. Zip it up and pull in the drawcords in colder climates, and make use of the multiple zips for extending your limbs or using as an open quilt when the nights are warm. Featuring a 30D nylon shell, 20D nylon lining, and R.D.S certified 750+ loft ultra-dry down fill - snuggle down in superior insulation.
To prevent cold spots, vertical baffles over the chest and side block baffles keep the down on top for ultimate warmth. Stash your phone or other valuables in the large internal security pocket, and connect to a sleeping mat thanks to the adjustable webbing loop system.
Be it kipping in your van, heading to your favourite camping spot, or staying in huts – the Amplitude Am3 Sleeping Bag from Sea to Summit will keep you warm and comfortable.
Ultra-wide rectangular shape
Comfort rating -8°, lower limit -15°
Multiple zips allow for temperature adjustment or use as a quilt
Vertical baffles over the chest to prevent down migration and cold spots
Side block baffles for maximum insulation
High-quality R.D.S certified 750+ loft down fill
Panelled foot box and 3D hood prevents down from being compressed
Removable adjustable webbing loops to connect to a mat
30D nylon shell and 20D nylon lining
Can be zipped with a compatible sleeping bag
Snowys Comfort Rating:
Contoured Rectangular | Ultra−wide Circumference
Fill Ratio Top/Bottom:
Max. User Height:
194 cm Chest | 190 cm Hip | 142 cm Foot
205L x 90W cm
46L x 20W cm
RDS 750+ Loft ULTRA−DRY Down™
Zip Draft Tube:
Dual #5 YKK | Six Zip Sliders on Three Two−Way Zips | Zip Coupling Compatible
Yes, all Sea to Summit down backs come with a mesh storage cube, and a stuff sack. Obviously it's best to store the bag uncompressed in the mesh cube between trips, and only use the stuff sack when you're away.
Lauren - Snowys(9 months ago)
Zipping Together1 answer
If I purchased 2x of these can they be zipped together?
Malcom - 5031(9 months ago)
Yes, you can join two of these together, they are also compatible with other 'Zip Coupling' bags from Sea To Summit.