Sea to Summit Amplitude AmII Sleeping Bag Long indigo / royal(indigo / royal)
Ideal for adventures with a base camp, the Amplitude down sleeping bag brings spacious luxury and incredibly versatile ventilation options to wherever your travels may take you. Each side of the Amplitude has a full-length side zipper; a third zipper can be found in the foot box. High-lofting down and quality construction keeps you cozy when it’s cold, and the zippers provide temperature regulation up to the point where you remove the upper section and sleep under it as a quilt.
Details
- 6 YKK #5 sliders on three two-way zips for ultimate ventilation options
- Sleeping bag can be zipped together with others
- Includes: Ultra-Sil compression sack for compact pack size
- Generous contoured rectangular cut
- Variable zips transform the sleeping bag into a quilt in its own right
- Vertical chambers in the chest area optimise the distribution of down and prevent cold bridges
- Zipper channel prevents heat loss from the zipper
- Generous hood with dual drawcord
- Easily adjustable fastening system for a connection between sleeping bag and mat
- Spacious interior pocket
- Compression Bag 8 L



















Emily Carter –
The Sea to Summit Amplitude AmII Sleeping Bag is incredibly comfortable and warm. Perfect for chilly nights outdoors.
James Thompson –
Very impressed with the quality and durability of this sleeping bag. The indigo/royal colour is also quite stylish.
Sophie Williams –
I found the bag a bit bulky for backpacking, but the warmth and comfort make up for it. Great for car camping.
Oliver Brown –
The zipper sometimes gets stuck, which can be frustrating. Otherwise, it’s a solid sleeping bag.
Charlotte Green –
Excellent sleeping bag! It’s lightweight and packs down well, making it ideal for long hikes.
Harry Wilson –
The temperature rating seems accurate. I stayed warm even on a cold mountain night. Highly recommend.
Amelia Hall –
The material feels premium, and the bag is easy to clean. Love the attention to detail in the design.
George Clarke –
Great value for the price. It’s comfortable, warm, and well-built. Would buy again.
Isabella Young –
The long size is perfect for taller individuals. I finally found a sleeping bag that fits me well!
Noah Walker –
I’ve used this bag on several trips now, and it’s held up perfectly. Very reliable in various weather conditions.
Mia Roberts –
The bag is a bit heavy for ultralight backpacking, but it’s so cozy that I don’t mind the extra weight.
Lucas Scott –
Sea to Summit never disappoints. This sleeping bag is top-notch in terms of quality and performance.